2007

Honda CR85R/85RB EXPERT

OWNER’S MANUAL & COMPETITION HANDBOOK
Introduction
Congratulations on choosing your Honda CR As you read this manual, you will find
motocross motorcycle. information that is preceded by a NOTICE
symbol. This information is intended to help you
When you own a Honda, you’re part of a avoid damage to your Honda, other property, or
worldwide family of satisfied customers-people the environment.
who appreciate Honda’s reputation for building
quality into every product. Unless you are mechanically qualified and have
the proper tools, you should see your Honda
Your CR is a high performance racing dealer for the service and adjustment procedures
motorcycle that utilizes the latest motocross discussed in this manual.
technology and is intended for competition use in
sanctioned, closed-course events by experienced The official Honda Service Manual for your CR
riders only. is available (page 120). It is the same manual
your dealer uses. If you plan to do any service
Be aware that motocross is a physically on your CR beyond the standard maintenance
demanding sport that requires more than just a procedures in this manual, you will find the
fine motorcycle. To do well, you must be in Service Manual a valuable reference.
excellent physical condition and be a skillful
rider. For the best results, work diligently on If you have any questions, or if you ever need a
your physical conditioning and practice special service or repairs, remember that your
frequently. Honda dealer knows your CR best and is
dedicated to your complete satisfaction.
Before riding, take time to get acquainted with
your CR and how it works. To protect your Please report any change of address or ownership
investment, we urge you to take responsibility for to your Honda dealer so we will be able to
keeping your CR well maintained. Scheduled contact you concerning important production
service is a must, of course. But it’s just as information.
important to observe the break-in guidelines, and
perform all the pre-ride and other periodic checks You may also want to visit our website at
detailed in this manual. www.honda.com.

You should also read the owner’s manual before Happy riding!
you ride. It’s full of facts, instructions, safety
information, and helpful tips. To make it easy to California Proposition 65 Warning
use, the manual contains a table of contents, a WARNING: This product contains or emits
detailed list of topics at the beginning of each chemicals known to the State of California to
section, and an index at the back of the book. cause cancer and birth defects or other
reproductive harm.

Introduction
 A Few Words About Safety
Your safety, and the safety of others, is very important. And operating this motorcycle safely is an important responsibility.

To help you make informed decisions about safety, this manual contains a section devoted to Motorcycle Safety, as well as a number of Safety Messages
throughout the manual.

Safety Messages are preceded by a safety alert symbol and one of three signal words: DANGER, WARNING, or CAUTION.

These signal words mean:

DANGER You WILL be KILLED or SERIOUSLY HURT if you don’t follow instructions.

WARNING You CAN be KILLED or SERIOUSLY HURT if you don’t follow instructions.

CAUTION You CAN be HURT if you don’t follow instructions.

Of course, it is not practical or possible to warn you about all hazards associated with operating or maintaining a motorcycle. You must use your own good
judgement.

Safety Messages
Contents
MOTORCYCLE SAFETY................................1 Service Preparations TIPS ..................................................................99
Important Safety Information...............................2 Maintenance Component Locations...................28 Transporting Your Motorcycle .........................100
Important Safety Precautions..........................2 Seat Removal......................................................29 Storing Your Honda..........................................101
Important Message to Parents.........................2 Fuel Tank Removal ............................................30 You & the Environment ...................................102
Accessories & Modifications ...............................3 Subframe Removal .............................................32 Troubleshooting................................................103
Safety Labels ........................................................4
Service Procedures TECHNICAL INFORMATION ...................105
OPERATING CONTROLS...............................5 Fluid & Filters Vehicle Identification .......................................106
Operation Component Locations .........................6 Fuel System ........................................................34 Specifications ...................................................107
Transmission Oil ................................................36 Torque Specifications .......................................109
BEFORE RIDING..............................................7 Coolant ...............................................................38 High Altitude Carburetor Adjustment ..............111
Are You Ready to Ride?.......................................8 Air Cleaner .........................................................40 Oxygenated Fuels.............................................112
Is Your Motorcycle Ready to Ride? .....................9 Competition Logbook ......................................113
Pre-ride Inspection..........................................9 Engine Optional Parts List............................................115
Throttle ...............................................................42 Spare Parts & Equipment.................................117
BASIC OPERATING INSTRUCTIONS........11 Clutch System ....................................................44 Wiring Diagram................................................118
Safe Riding Precautions................................12 Spark Plug ..........................................................46
Starting & Stopping the Engine .........................13 Cylinder System .................................................47 CONSUMER INFORMATION ....................119
Preparation ....................................................13 Authorized Manuals .........................................120
Starting Procedure ........................................13 Chassis Contacting Honda.............................................121
Flooded Engine .............................................13 Suspension..........................................................52 Your Honda Dealer...........................................122
How to Stop the Engine................................14 Brakes.................................................................57 The Honda Rider’s Club (USA only) ..............123
Shifting Gears.....................................................15 Wheels ................................................................61
Break-in Guidelines ...........................................16 Tires & Tubes .....................................................62 TABLE OF CONTENTS ...............................124
Drive Chain ........................................................64
SERVICING YOUR HONDA .........................17 Expansion Chamber ...........................................67 INDEX .............................................................126
Before You Service Your Honda Additional Maintenance Procedures ..................68
The Importance of Maintenance ........................18 QUICK REFERENCE
Maintenance Safety ............................................19 Appearance Care ................................................69
Important Safety Precautions........................19
Maintenance Schedule .......................................20 ADJUSTMENTS FOR COMPETITION ......71
General Competition Maintenance ....................22 Front Suspension Adjustments...........................72
Before & After Competition Maintenance.........26 Rear Suspension Adjustments ............................80
Between Motos & Practice Maintenance .....26 Suspension Adjustments for Track
After Competition Maintenance ...................27 Conditions ..............................................84
Suspension Adjustment Guidelines....................85
Carburetor Adjustments & Tuning Tips .............88
Chassis Adjustments...........................................95
Gearing ...............................................................96
Tire Selection for Track Conditions...................97
Personal Fit Adjustments ...................................98

Contents
 Motorcycle Safety
This section presents some of the most important Important Safety Information...............................2
information and recommendations to help you Important Safety Precautions..........................2
ride your CR safely. Please take a few moments Important Message to Parents.........................2
to read these pages. This section also includes Accessories & Modifications ...............................3
information about the location of the safety label Safety Labels ........................................................4
on your CR.

Motorcycle Safety 1
Important Safety Information
Don't Drink and Ride.
Important Safety Precautions Alcohol and riding don't mix. Even one drink can Important Message to Parents
reduce your ability to respond to changing
Your CR can provide many years of pleasure, if conditions, and your reaction time gets worse Your child's safely is very important to Honda.
you take responsibility for your own safety and with every additional drink. So don't drink and That's why we urge you to read this message
understand the challenges you can meet in ride, and don't let your friends drink and ride before you let any young person ride this
competitive racing. either. motorcycle. Competitive riding can be fun. But
bad judgement can result in injury, and we don't
As an experienced rider, you know there is much Keep Your Honda in Safe Condition. want that to happen. As a parent, you can help
you can do to protect yourself when you ride. Maintaining your CR properly is critical to your prevent accidents by making good decisions
The following are a few precautions we consider safety. A loose bolt, for example, can cause a about when and how your youngster rides this
most important. breakdown in which you can be seriously injured. motorcycle.

Never Carry a Passenger. • Remember, this CR is designed only for

Your CR is designed for one operator only. competition use by experienced junior riders.
Carring a passenger can cause an accident in It is an operator only model, and the
which you and others can be hurt. maximum load capacity is 150 lbs. Rider
weight must not exceed this limit.
Wear Protective Gear.
Whether you’re practicing to improve your skills, • The junior rider must be tall enough to hold
or riding in competition, always wear an the motorcycle up while straddling it with
approved helmet, eye protection, and proper both feet on the ground. He or she must also
protective gear. be strong enough to pick up the motorcycle if
it is on its side.
Take Time to Get to Know Your CR.
Because every motorcycle is unique, take time to • The parent and junior rider must be fully
become thoroughly familiar with how this one familiar with the motorcycle, the motorcycle
operates and responds to your commands before controls and control functions. Both must also
placing your machine, and yourself, in Fully understand everything in this manual
competition. before riding begins.

Learn and Respect Your Limits. • For your child's safely, be sure to make
Never ride beyond your personal abilities or pre-practice and pre-race inspections, and
faster than conditions warrant. Remember that impress on the junior rider the importance of
alcohol, drugs, illness and fatigue can reduce checking all the items thoroughly before
your ability to perform well and ride safety. riding.

2 Motorcycle Safety
 Accessories & Modifications
Accessories & Modifications

Installing non-Honda accessories, removing

original equipment, or modifying your CR in any
way that would change its design or operation,
could seriously impair your CR’s handling,
stability, and braking, making it unsafe to ride.

WARNING
Improper accessories or modifications
can cause a crash in which you can be
seriously hurt or killed.

Follow all instructions in this owner’s

manual regarding modifications and
accessories.

Motorcycle Safety 3
Safety Labels
Read this label carefully and don’t remove it.

If the label comes off or becomes hard to read, contact your Honda dealer for replacement.

4 Motorcycle Safety
 Operating Controls
Read this section carefully before you ride. It Operation Component Locations .........................6
presents the location of the basic controls on your
CR.

Operating Controls 5
Operation Component Locations
clutch lever
front brake lever

engine stop button

throttle grip

choke knob

fuel valve shift lever kickstarter rear brake pedal

6 Operating Controls
 Before Riding
Before each ride, you need to make sure you and Are You Ready to Ride?.......................................8
your Honda are both ready to ride. To help get Is Your Motorcycle Ready to Ride? .....................9
you prepared, this section discusses how to Pre-ride Inspection .............................................9
evaluate your riding readiness, and what items
you should check on your CR.

For information about suspension, carburetor, and

other adjustment for competition, see page 71.

Before Riding 7
Are You Ready to Ride?
Before riding your CR for the first time, we
strongly recommend that you read this owner’s WARNING
manual, make sure you understand the safety Not wearing a helmet increases the
messages, and know how to operate the controls. chance of serious injury or death in a
crash.
Before each ride, it’s also important to make sure
you and your CR are both ready to ride. Be sure you always wear a helmet, eye
protection and other protective apparel
For information about suspension, carburetor, and when you ride.
other adjustments for competition, see page 71.

Whether you’re preparing for competition or for

practice, always make sure you are.

• In good physical and mental condition

• Free of alcohol and drugs

• Wearing an approved helmet, eye protection,

and other appropriate riding gear

Although complete protection is not possible,

wearing the proper gear can reduce the chance or
severity of injury when you ride.

8 Before Riding
 Is Your Motorcycle Ready to Ride?
Competitive riding can be tough on a motorcycle,
so it’s important to inspect your CR and correct Pre-ride Inspection
any problems you find before each ride. Check
the following items (page numbers are at the Check the following before each ride:
right): • Transmission oil level ...................................37
• Coolant for proper level................................38
• Cooling system and hoses for condition.......39
WARNING • Spark plug for proper heat range, carbon
Improperly maintaining this motorcycle or fouling and high tension cord terminal for
failing to correct a problem before riding looseness .......................................................46
can cause a crash in which you can be • Air cleaner for condition and
seriously hurt or killed. contamination................................................40
• Clutch operation and freeplay.......................44
Always perform a pre-ride inspection • Steering head bearings and related parts
before every ride and correct any for condition..................................................68
problems. • Carburetor throttle operation ........................42
• Tires for damage or improper inflation
pressure ........................................................62
• Spokes for looseness.....................................61
• Rim locks for looseness................................61
• Front and rear suspension for proper
operation .................................................52, 53
• Front and rear brakes, check operation ........57
• Drive chain for correct slack and adequate
lubrication .....................................................64
• Drive chain guide, slider and guide roller
for damage or wear .......................................64
• Expansion chamber springs for damage or
lack of tension...............................................67
• Every possible part for looseness (such as
cylinder head nuts, carburetor insulator bolts,
engine mounting bolts, axle nuts, handlebar
holder bolts, fork bridge pinch bolts, drive
chain adjusters, drive chain guide, kickstarter
mounting bolts and wire harness
connectors)....................................68, 109, 110

Before Riding 9
10 Before Riding
 Basic Operating Instructions
This section gives basic information on how to Safe Riding Precautions................................12
start and stop your engine as well as break-in Starting & Stopping the Engine .........................13
guidelines. Preparation ....................................................13
Starting Procedure ........................................13
Flooded Engine .............................................13
How to Stop the Engine................................14
Shifting Gears.....................................................15
Break-in Guidelines ...........................................16

Basic Operating Instructions 11

Basic Operating Instructions
Safe Riding Precautions

Before riding your CR for the first time, please

review the Important Safety Precautions
beginning on page 2 and the previous section,
titled Before Riding.

For your safety, avoid starting or operating the

engine in an enclosed area such as a garage.
Your CR’s exhaust contains poisonous carbon
monoxide gas which can collect rapidly in an
enclosed area and cause illness or death.

12 Basic Operating Instructions

 Starting & Stopping the Engine
Always follow the proper starting procedure Check the transmission oil and coolant levels
described below. before starting the engine (pages 37, 38). Flooded Engine

Your CR can be kickstarted with the transmission Cold Engine Starting

in gear by pulling in the clutch lever before 1. Turn the fuel valve (1) ON.
operating the kickstarter. 2. Shift the transmission into neutral. (2)
3. Pull the choke knob (2) up.
4. With closed throttle, operate the kickstarter.
Preparation Starting from the top of the kickstarter stroke,
kick through to the bottom with a rapid,
Make sure that the transmission is in neutral. continuous motion. (1)
Turn the fuel valve ON. 5. After the engine starts, the choke knob should
be pushed down as soon as possible to
prevent spark plug fouling. (1) throttle (2) engine stop button
Starting Procedure 6. Allow the engine to warm up for at least 2
minutes before riding off, preferably until the
Always follow the proper starting procedure side of the cylinder is very warm to the touch If the engine fails to start after repeated attempts,
described below. through your riding glove. Slowly increase it may be flooded with excess fuel. To clear a
rpm and don’t blip the throttle. Warming the flooded engine:
engine is important to prevent cold seizures.
1. Shift the transmission into neutral.
Warm Engine Starting 2. Push the choke knob down all the way to
1. Turn the fuel valve ON. OFF.
2. Shift the transmission into neutral. 3. Open the throttle (1) fully.
3. Push the choke knob down. 4. While pushing the engine stop button (2),
4. Open the throttle (1/8 – 1/4) and operate the crank the engine several times with the
kickstarter. kickstarter.
5. Release the engine stop button.
(1) (2) 6. Follow the Warm Engine Starting procedure.
(1)

(1) fuel valve (2) choke knob

Basic Operating Instructions 13

Starting & Stopping the Engine
How to Stop the Engine

(1)
(2)

(1) throttle (2) engine stop button

Normal Engine Stop

1. Shift the transmission into neutral.
2. Turn the fuel valve OFF.
3. Lightly open the throttle (1) two or three
times, and then close it.
4. Depress and hold the engine stop button (2)
until the engine stops completely.

Failure to close the fuel valve may cause the

carburetor to overflow, fill the crankcase with
fuel and result in hard starting.

Emergency Engine Stop

To stop the engine in an emergency, press the
engine stop button.

14 Basic Operating Instructions

 Shifting Gears
NOTICE
Downshifting can help slow your motorcycle,
especially on downhills. However, downshifting
when engine rpm is too high can cause engine
damage.

NOTICE
To prevent transmission damage, do not coast or
tow the motorcycle for long distances with the
engine off.

1. After the engine has been warmed up, the

motorcycle is ready for riding.
2. While the engine is idling, pull in the clutch
lever and depress the shift lever to shift into
1st (low) gear.
3. Slowly release the clutch lever and at the
same time gradually increase engine speed by
opening the throttle. Coordination of the
throttle and clutch lever will assure a smooth
positive start.

NOTICE
When moving off from a standing start, be careful
not to use too much throttle. The motorcycle may
"wheelie" over backwards.

4. When the motorcycle attains a moderate

speed, close the throttle, pull in the clutch
lever and shift to 2nd gear by raising the shift
lever.
5. This sequence is repeated to progressively
shift to 3rd, 4th, 5th, and 6th (top) gear. Raise
the shift lever to shift to a higher gear and
depress it to downshift. Each stroke of the
shift lever engages the next gear in sequence.
The shift lever automatically returns to the
horizontal position when released.

Basic Operating Instructions 15

Break-in Guidelines
Help assure your CR’s future reliability and
performance by paying extra attention to how
you ride during the first operating day or 15
miles (25 km).
During this period, avoid full-throttle starts and
rapid acceleration.

This same procedure should be followed each

time when:
• piston is replaced
• rings are replaced
• cylinder is replaced
• crankshaft or crankshaft bearings are replaced

16 Basic Operating Instructions

 Servicing Your Honda
Keeping your CR well maintained is absolutely Before You Service Your Honda Chassis
essential to your safety. It’s also a good way to The Importance of Maintenance ........................18 Suspension..........................................................52
protect your investment, get maximum Maintenance Safety ............................................19 Brakes.................................................................57
performance, avoid breakdowns, and have more Important Safety Precautions........................19 Wheels ................................................................61
fun. Maintenance Schedule .......................................20 Tires & Tubes .....................................................62
General Competition Maintenance ....................22 Drive Chain ........................................................64
To help keep your CR in good shape, this section Before & After Competition Maintenance.........26 Expansion Chamber ...........................................67
includes a Maintenance Schedule for required Between Motos & Practice Maintenance .....26 Additional Maintenance Procedures ..................68
servicing and step-by-step instructions for After Competition Maintenance ...................27
specific maintenance tasks. You’ll also find Appearance Care ................................................69
important safety precautions, information on oils, Service Preparations
and tips for keeping your Honda looking good. Maintenance Component Locations...................28
Seat Removal......................................................29
An ICM (Ignition Control Module) system is Fuel Tank Removal ............................................30
used on this motorcycle; consequently, routine Subframe Removal .............................................32
ignition timing adjustment is unnecessary. If you
want to check the ignition timing, refer to the Service Procedures
Honda Service Manual (page 120).
Fluids & Filters
An optional tool kit may be available. Fuel System ........................................................34
Check with your Honda dealer's parts Transmission Oil ................................................36
department. Coolant ...............................................................38
Air Cleaner .........................................................40

Engine
Throttle ...............................................................42
Clutch System ....................................................44
Spark Plug ..........................................................46
Cylinder System .................................................47

Servicing Your Honda 17

The Importance of Maintenance
Keeping your CR well-maintained is absolutely
essential to your safety. It’s also a good way to
get maximum performance during each moto.
Careful pre-ride inspections and good
maintenance are especially important because
your CR is designed to be ridden in off-road
competition.

Remember, proper maintenance is your

responsibility. Be sure to inspect your CR before
each ride and follow the Maintenance Schedule
in this section.

WARNING
Improperly maintaining this motorcycle or
failing to correct a problem before you
ride can cause a crash in which you can
be seriously hurt or killed.

Always follow the inspection and

maintenance recommendations and
schedules in this owner’s manual.

18 Servicing Your Honda

 Maintenance Safety
This section includes instructions on how to • Read the instructions before you begin, and
perform some important maintenance tasks. make sure you have the tools and skills
Some of the most important safety precautions required.
follow. However, we cannot warn you of every
conceivable hazard that can arise in performing • To help prevent the motorcycle from falling
maintenance. Only you can decide whether or over, park it on a firm, level surface, using the
not you should perform a given task. optional work stand or a maintenance stand to
provide support.
WARNING • To reduce the possibility of a fire or
Failure to properly follow maintenance explosion, be careful when working around
instructions and precautions can cause gasoline. Use only a non-flammable (high
you to be seriously hurt or killed. flash point) solvent such as kerosene —not
gasoline— to clean parts. Keep cigarettes,
Always follow the procedures and sparks, and flames away from all fuel-related
precautions in this owner’s manual. parts.

Important Safety Precautions

• Make sure the engine is off before you begin

any maintenance or repairs.
This will help eliminate several potential
hazards:

Carbon monoxide poisoning from engine

exhaust. Be sure there is adequate ventilation
whenever you operate the engine.

Burns from hot motorcycle parts. Let the

engine and exhaust system cool before
touching.

Injury from moving parts. Do not run the

engine unless instructed to do so.

Servicing Your Honda 19

Maintenance Schedule
To maintain the safety and reliability of your CR, Perform the pre-ride inspection (page 9) at each
regular inspection and service is required as scheduled maintenance period.
shown in the Maintenance Schedule that follows.
Summary of Maintenance Schedule Notes and
The Maintenance Schedule lists items that can be Procedures:
performed with basic mechanical skills and hand
tools. Procedures for these items are provided in Notes:
this manual. 1. Clean after every moto for dusty riding
conditions.
The Maintenance Schedule also includes items 2. Replace every 2 years. Replacement requires
that involve more extensive procedures and may mechanical skill.
require special training, tools, and equipment. 3. Replace after the first break-in ride.
Therefore, we recommend that you have your
Honda dealer perform these tasks unless you Maintenance Procedures:
have advanced mechanical skills and the required I: inspect and clean, adjust, lubricate, or replace,
tools. Procedures for items in this schedule are if necessary
provided in a service manual available for C: clean
purchase from your dealer (page 120). L: lubricate
R: replace
Service intervals in the maintenance schedule are
expressed in terms of races and riding hours. To
avoid overlooking required service, we urge you
to develop a convenient way to record the
number of races and/or hours you ride.

If you do not feel capable of performing a given

task or need assistance, remember that your
Honda dealer knows your CR best and is fully
equipped to maintain and repair it. If you decide
to do your own maintenance, use only genuine
Honda parts or their equivalents for repair or
replacement to ensure the best quality and
reliability.

20 Servicing Your Honda

 Maintenance Schedule
All items should be checked before each competition event. See your Honda dealer unless you are mechanically qualified and have the proper tools.

Damage from competition use is not covered by the Distributor's Limited Warranty on your Honda.
Perform the Pre-ride Inspection at each scheduled maintenance period.
I: Inspect and Clean, Adjust, Lubricate or Replace if necessary. C: Clean. L: Lubricate. R: Replace.

Frequency Each race Every 3 races Every 9 races

Note or about or about or about Ref. page
Item 2.5 hours 7.5 hours 22.5 hours
Throttle Operation I 42
Air Filter Note 1 C 40
Spark Plug I R 46
Radiator Coolant Note 2 I 38
Cooling System I 39
Cylinder Head Decarbonizing C 48
Piston and Piston Rings R 48
Piston Pin and Connecting Rod Small End Bearing R 48
Reed Valve Only R 49
Transmission Oil R 36
Drive Chain I, L R 64 – 66
Drive Chain Slider I 64
Drive Chain Roller I 65
Drive Sprocket I 66
Driven Sprocket I 66
Brake Fluid Note 2 I 58, 59
Brake Pads Wear I 60
Brake System I 57
Clutch System I 44
Control Cables I,L 68
Expansion Chamber/Silencer I 67
Suspension I 52, 53
Swingarm/Shock Linkage L 25, 53
Fork Oil Note 3 R 54
Wheels/Tires I 61 – 63
Nuts, Bolts, Fasteners I 68, 109, 110
Steering Head Bearing I 68
This maintenance schedule is based upon average riding condition. Machines subjected to severe use require more frequent servicing.
NOTE: 1. Clean after every moto (heat) for dusty riding conditions.
2. Replace every 2 years. Replacement requires mechanical skill.
3. Replace after the first break-in ride.

Servicing Your Honda 21

General Competition Maintenance
Perform maintenance on firm, level ground using
the optional workstand, or equivalent support.

When tightening bolts, nuts or screws, start with

the larger diameter or inner fasteners, and tighten
them to the specified torque using a crisscross
pattern.

Use genuine Honda parts or their equivalent

when servicing your CR.

Clean parts in non-flammable (high flash point)

cleaning solvent (such as kerosene) when
disassembling. Lubricate any sliding surface,
O-rings, and seals before reassembling. Grease
parts by coating or filling where specified.

After any engine disassembly, always install new

gaskets, O-rings, cotter pins, piston pin clips,
snap rings, etc. when reassembling. After
reassembly, check all parts for proper installation
and operation.

All Pre-ride Inspection Items

Refer to Pre-ride Inspection in your Owner’s
Manual, page 9.

22 Servicing Your Honda

 General Competition Maintenance
Handgrips
Always use Pro Honda Handgrip Cement (U.S.A
only) or Honda Bond A when replacing handgrips.

Throttle Grip
Align the “∆” mark on the throttle grip with the hole
of the throttle cable guide. Left handlebar grip: Align
the top of the waffle pattern on the grip with the Air Cleaner
clutch lever as shown in the illustration. Clean and oil your air cleaner regularly because the volume
Refer to the Service Manual for installation of air able to pass through it has a great effect on
performance. Both engine performance and long term
instructions.
durability may be affected by an air cleaner that has
deteriorated and allows dirt to pass. Inspect the air cleaner
closely each time it’s serviced for evidence of small tears or
seam separation. Keep a spare air cleaner oiled and ready to
install, sealed in a plastic bag. Riding in dusty conditions
may require servicing the air cleaner or replacing it with a
pre-serviced air cleaner between motos. Be careful not to
over oil the air cleaner. While it is important to oil the air
For added security, you may choose to safety wire the cleaner thoroughly, over oiling will cause an overall rich
handgrips to the handlebar and throttle to prevent the running condition, probably more noticeable off idle and in
low rpm performance. Follow the servicing instructions in
possibility of them loosening. Position the twisted
the Maintenance section. Use Pro Honda Foam Filter Oil or
wire ends away from your palms and be sure to bend an equivalent. Be sure to grease the air cleaner flange where
the wire ends well into the grip rubber so they will not it contacts the air cleaner housing. Pro Honda White
snag your glove. Lithium Grease, or an equivalent, is handy for this because
any dirt that penetrates this sealing area will show up clearly
(page 40).
Use the Honda genuine air cleaner or an equivalent air
cleaner specified for your model.
Using the wrong Honda air cleaner or a non-Honda air
cleaner which is not of equivalent quality may cause
premature engine wear or performance problems.

Throttle Control
Remove the throttle control every few rides, clean the inside
of the drum and the handlebar thoroughly, and apply a light
coating of silicone lubricant. Inspect the cable carefully for Air Cleaner Housing Sealing
kinks or other damage that may restrict throttle control in Transmission Oil Remove and reseal the air cleaner housing boot where it
any way. Move the handlebar from lock to lock to be sure Drain and replace transmission oil often to ensure the connects to the air cleaner housing with silicone sealer if
there is no cable interference. Check to be sure the top of greatest service life of the transmission and clutch. Frequent there is any doubt to its sealing integrity. Use Pro Honda
the carburetor is screwed on tight. Make certain the throttle oil changes will also assure consistent performance of both Hondalock or an equivalent on the attaching studs. Inspect
operation is perfect after servicing and inspecting. shifting and clutch action (page 36). the air cleaner and air intake tract regularly for signs of
deterioration or dirt penetration.

Servicing Your Honda 23

General Competition Maintenance
Gaskets Fuel Filter
Spark Plug Always use new gaskets when reassembling components. Periodically drain the fuel from the tank, remove and clean
Some non-resistor plugs may cause ignition problems. the fuel valve/filter. Replace the fuel valve O-ring if there
Refer to the recommendations elsewhere in this manual for Cylinder Removal are any signs of damage or deterioration (page 35).
specific types so you will be sure to use the proper reach Put a little grease on the cylinder mounting dowels to
and heat range. Replace periodically as specified in the prevent corrosion from dissimilar metals. The tolerances are Fuel Contamination
Maintenance Schedule (page 21). quite tight, so it’s important to keep these dowels absolutely Periodically drain the float bowl and inspect the
clean (page 47). carburetor for contamination from dirt (page 92).

Spark Plug Cap

Install a small plastic tie-wrap around the spark plug cap to
reduce any possibility of it loosening or of water
penetration.

Inlet Tract Sealing

Air leaks around the carburetor insulator and reed valve
Electrical Connectors assembly should be cured by disassembling, cleaning and
Clean electrical connectors and wrap them with electrical resealing with new gaskets and some sealing agent. Be
tape to reduce the possibility of unwanted disconnections, careful not to overtighten the mounting bolts — this is the
water shorts or corrosion. Additional corrosion protection is most common cause for leaks here. Inspect the mating
offered by using Pro Honda Dielectric Grease on all electri- surfaces, for warpage due to over-torquing.
cal connections.

Ignition
Remove the alternator cover and keep it off for a few hours
after each washing to let condensation evaporate. Pull the
flywheel rotor every few rides and clean it and its crankshaft
mounting surface, the alternator stator, the ignition pulse
Engine Mounting Bolts generator pickup and the entire ignition cavity thoroughly. Pressure/Vacuum Leak-Down Test
Make sure the engine mounting bolts are tightened to the The presence of dirt between the ignition pulse generator Perform this test at regular intervals to minimize the
proper torque specification. For added peace of mind, and the flywheel makes the ignition control module possibility of engine damage from air leaks.
remove the nuts, clean the threads, and apply Pro Honda compensate to maintain the ignition curve. Cleaning dirt
Hondalock or an equivalent prior to torquing the nuts. from the ignition side main seal helps to prevent premature
seal wear. Close inspection of this seal can reveal a leakage
problem before engine damage occurs.

24 Servicing Your Honda

 General Competition Maintenance
Swingarm Pivot Lubrication Brake Fluid Replacement Steering Head Bearings
Clean, inspect and lubricate when servicing suspension Refer to Brake Pad Wear on page, page 60. Periodically clean, inspect and regrease the steering head
linkage pivots. Be sure all of the suspension pivot seals are Brake Caliper Inspection: Be sure both the front and rear bearings — especially if wet, muddy or extremely dusty
in good condition. Use Pro Honda Moly 60 Paste (U.S.A. calipers are able to move freely on the caliper bracket pins. courses are encountered often. Use urea based multi-
only) or molybdenum disulfide paste (containing more than Check pad thickness periodically and replace the pads when purpose grease designed for high temperatute, high pressure
40% molybdenum disulfide additive). minimum thickness is reached. If the brakes fade when they performance (example: EXELITE EP2 manufactured by
are hot, inspect the pads for glazing or damage, and replace KYODO YUSHI, Japan or Shell Stamina EP2 or equivalent)
if necessary.
Brake Fluid Replacement: Replace the hydraulic fluid in the
brake system every two years. Replace the fluid more
frequently if you subject your brakes to severe use. Heavy
braking heats the brake fluid and it may deteriorate sooner
than expected. Any type of riding, that requires frequent use
of the brakes, such as in tight woods, can shorten the service
life of brake fluid.
Suspension Linkage Lubrication
Disassemble, clean, inspect and lubricate all pivot bearings
after each 7.5 hours of running time in order to maintain
proper suspension performance and minimize component
wear. Use Pro Honda Moly 60 Paste (U.S.A. only) or Fork Oil/Performance
molybdenum disulfide paste (containing more than 40% Disassemble, clean and inspect the fork and replace the oil
molybdenum disulfide additive). regularly. Contamination due to the tiny metal particles
produced from the normal action of the fork, as well as
normal oil breakdown, will deteriorate the performance of
the suspension. Refer to the Honda Service Manual. Use
only Pro Honda HP Fork Oil 5W (U.S.A. only) or
equivalent which contains special additives to assure
maximum performance of your CR’s front suspension.

Frame
Because your CR is a high-performance machine, the frame
should not be overlooked as part of your overall competition
Swingarm maintenance program. Periodically inspect the frame
Do not attempt to weld or otherwise repair a damaged swingarm. closely for possible cracking or other damage. It makes
Welding will weaken the swingarm. Water Pump Inspection Hole good racing sense.
After every race, check the inspection hole, located just
Footpegs below the water pump cover on the right crankcase cover. Spokes
Worn footpeg teeth can be repaired by filing the grooves Clean away any clogged dirt or sand, if necessary. Look for Check spoke tension frequently between the first few rides.
between the teeth with a triangular-shaped file. coolant or oil leakage. Leaking coolant indicates a worn or As the spokes, spoke nuts and rim contact points seat-in, the
Be aware that filing them too sharp will reduce boot sole damaged water seal. Leaking oil indicates a bad spokes may need to be retightened. Once past this initial
lifespan. Sharpen only the points of the teeth. Filing the transmission oil seal. If replacement is necessary, both seals seating-in period, the spokes should hold their tension. Still,
grooves deeper will weaken the footpegs. Be sure the pegs should be replaced. be sure your race maintenance program includes checking
are free to pivot freely and that the pivot pin retaining cotter spoke tension and overall wheel condition on a regular basis
pins are in good condition. (page 61).

Nuts, Bolts, Etc

Application of a thread locking agent to essential fasteners
offers added assurance and security. Remove the nuts, clean
the threads of both the nuts and bolts, apply Pro Honda
Hondalock or an equivalent and tighten to the specified torque.

Servicing Your Honda 25

Before & After Competition Maintenance
• Be sure the fuel and oil is mixed well by
Between Motos & Practice Maintenance agitating it thoroughly before pouring pre-mix
into the fuel tank.
After practice or between motos you have a
chance to make additional checks and WARNING
adjustments.
Gasoline is highly flammable and
• Clean accumulated dirt from under the explosive. You can be burned or seriously
fenders and off the wheels, suspension injured when handling fuel.
components, hand grips, controls, and
footpegs. A stiff, nylon parts cleaning brush • Stop the engine and keep heat, sparks
works well. and flame away.
(1) • Handle fuel only outdoors.
• Check tire air pressure.
• Check spoke tension and rim lock nut security. (1) chain adjuster index marks • Wipe up spills immediately.
• Check sprocket bolt and nut security.
• Suspend the front wheel above the ground and
use the pressure release screws (2) to release
the built-up pressure (in excess of normal
atmospheric pressure: 0 psi) in the fork tubes.
This pressure is caused by normal fork action
while riding. (If you are riding at altitude,
remember that fork pressure of 0 at sea level
will increase as elevation increases.)

• Clean the sides of the drive chain with a stiff,

nylon parts-cleaning brush. Lubricate and
adjust the chain as necessary.

Do not perform maintenance while engine is

running. Injury to your fingers or hands may (2)
result.

• After adjustment, check that the chain

adjuster index marks (1) are in the same (2) pressure release screws
position on each side. This will ensure that
the rear wheel is in proper alignment and
allow maximum performance from the rear
disc brake. Maintaining proper wheel
alignment will also extend brake pad wear.

26 Servicing Your Honda

 Before & After Competition Maintenance
Routine Cleaning
After Competition Maintenance If your CR is only slightly dirty, it is best to clean
it by hand with the aid of a stiff bristled nylon
It is important to the long term performance of brush and some clean rags.
your CR to practice a consistent maintenance
program. Right after the event is a good time to Take care to prevent catching your fingers
begin your next maintenance cycle. between the chain and sprockets.

After Race Lubrication A variety of reasonably priced cleaning brushes

Apply a light coating of rust-inhibiting oil to the are available from variety, drug, food, and
drive sprocket and any steel portions of the hardware stores. Some of these brushes are
chassis or engine where the paint has worn away. extremely useful in removing dirt from the many
This will prevent rusting of the exposed metal. tight contours of the metal pieces of your CR.
Apply rust-inhibiting oil more heavily if the Avoid using stiff, abrasive brushes on the plastic
event was particularly wet or muddy. Take care or rubber parts.
to avoid spraying any oil near the disc brakes or
the disc rotors. If your CR was exposed to sea air or salt water,
rinse it as soon as possible after the event, dry it,
Remove the drive chain, clean and lubricate it and apply a spray lubricant to all metal parts.
(page 65). Be sure the chain is wiped clean and
is dry before lubricating the chain. If you decide to wash your CR or use cleaners,
refer to Appearance Care (page 69).
Take care to prevent catching your fingers
between the chain and sprockets.

Servicing Your Honda 27

Maintenance Component Locations

front brake fluid reservoir

clutch lever front brake lever

throttle grip

radiator cap
front suspension rebound
damping adjuster
transmission oil
fuel fill cap filler cap
spark plug air cleaner
rear suspension compression
rear suspension
damping adjuster front brake caliper
pre-load adjuster
choke knob

transmission oil
crankcase breather
check bolt
tube
engine idle rear brake pedal
speed
rear brake fluid reservoir
rear suspension rebound front suspension compression
damping adjuster drive chain rear brake caliper
damping adjuster

28 Servicing Your Honda

 Seat Removal
Refer to Safety Precautions on page 19. Installation
1. Slide the seat front prong (1) onto the seat
Removal bracket (2) and the seat rear prong (3) onto
1. Remove the seat bolts (1). the tab (4) by pushing down and forward on
2. Slide the seat (2) back. the seat in each of these areas.
(1) 2. Install the seat bolts (5) and tighten them to
(2)
the specified torque:
19 lbf·ft (26 N·m, 2.7 kgf·m)

(5)
(1) (3)

(1) seat bolts

(2) seat
(2)
(4)

(1) seat front prong

(2) seat bracket
(3) seat rear prong
(4) tab
(5) seat bolts

Servicing Your Honda 29

Fuel Tank Removal
Refer to Safety Precautions on page 19. 5. Remove the seat (page 29).
6. Pull the breather tube (6) out of steering stem WARNING
Removal nut. Gasoline is highly flammable and
1. Turn the fuel valve OFF. 7. Unhook and remove the fuel tank band (7). explosive. You can be burned or seriously
2. Remove the right side shroud bolts (1). 8. Disconnect the fuel line (8) from the fuel injured when handling fuel.
3. Remove the right side shroud (2) while sliding valve.
it forward. 9. Remove the right and left side fuel tank • Stop the engine and keep heat, sparks
bolts/washers (9) and fuel tank. and flame away.
(2) • Handle fuel only outdoors.
• Wipe up spills immediately.
(6)
(9)

(7)
(8)

(1)
(1) right side shroud bolts
(2) right side shroud

4. Remove the left side shroud bolts (3), collar (6) breather tube
(4) and left side shroud (5). (7) fuel tank band
(8) fuel line
(9) right and left side fuel tank bolts/washers
(5)
(3)

(3)
(4)

(3) left side shroud bolts

(4) collar
(5) left side shroud

30 Servicing Your Honda

 Fuel Tank Removal
Installation 6. Install the seat (page 29).
1. Install the fuel tank on the frame. 7. Install the left side shroud (5), collar (6) and
2. Tighten the right and left side fuel tank left side shroud bolts (7).
bolts/washers (1). (5)
3. Connect the fuel line (2) to the fuel valve. (7)
4. Hook the fuel tank band (3).
5. Put the breather tube (4) in the steering stem
nut.

(4)
(1)

(3) (7)
(2) (6)

(5) left side shroud

(6) collar
(7) left side shroud bolts

8. Install the right side shroud (8) by aligning the

grommet (9) of the shroud and boss (10) of
(1) right and left side fuel tank bolts/washers
(2) fuel line the fuel tank.
(3) fuel tank band 9. Tighten the right side shroud bolts (11).
(4) breather tube
(11)

(10)
(8)

(9)

(8) right side shroud

(9) grommet
(10) boss
(11) right side shroud bolts

Servicing Your Honda 31

Subframe Removal
Refer to Safety Precautions on page 19. 4. Loosen the screw (5) on the air cleaner Installation
connecting tube clamp (6). 1. Loosely attach the upper and lower ends of
Removal the subframe to the mainframe while
1. Remove the seat (page 29). connecting the air cleaner connecting tube to
2. Remove the right side cover (1) by removing (6) the carburetor.
the bolt/collar (2). 2. Tighten the screw (1) on the connecting tube
clamp (2).

(2) (2)

(5)
(1)

(5) screw
(6) connecting tube clamp (1)

5. Remove the lower subframe mounting bolts

(7) and upper subframe mounting bolt (8). (1) screw
(1) right side cover 6. Remove the subframe (9) by pulling it straight (2) connecting tube clamp
(2) bolt/collar backward.
3. Align the subframe (3) with the rear wheel
3. Remove the bolt/washer (3) and silencer (4). and install the upper subframe mounting bolt
(4) and lower subframe mounting bolts (5).
(3) 4. Tighten the upper subframe mounting bolt to
(9)
the specified torque:
(8) 16 lbf·ft (22 N·m, 2.2 kgf·m)
5. Tighten the lower subframe mounting bolts to
the specified torque:
16 lbf·ft (22 N·m, 2.2 kgf·m)
(7)
(4)

(3)
(4)
(7) lower subframe mounting bolts
(8) upper subframe mounting bolt
(3) bolt/washer (9) subframe
(4) silencer (5)

(3) subframe
(4) upper subframe mounting bolt
(5) lower subframe mounting bolts

32 Servicing Your Honda

 Subframe Removal
6. Connect the silencer (6) to the expansion
chamber with the sealing rubber.
Install the rubber seal (7) with its "FR" mark (8)
facing foward.
7. Install and tighten the bolt/washer (9).
(9)

(6)

(7) (8)

(6) silencer (8) "FR" mark

(7) rubber seal (9) bolt/washer

8. Install the right side cover (10) and bolt/collar

(11).

(11)

(10)

(10) right side cover (11) bolt/collar

9. Install the seat (page 29).

Servicing Your Honda 33

Fuel System
Refer to Safety Precautions on page 19. Premix gasoline and oil in a ratio of 32:1. 32:1 FUEL OIL MIXING CHART
Prepare the fuel mixture in a clean container, and
shake until thoroughly mixed before filling the Fuel Oil
Fuel Recommendation fuel tank. 32 1

USE Pro Honda HP2 2-stroke Oil Gallons Liters Ounces cm3
Type Unleaded
(32:1) OR AN EQUIVALENT. 0.5 1.89 2.0 59
Pump Octane Number 91 (or higher) 1.0 3.78 4.0 118
1.5 5.67 6.0 177
NOTICE 2.0 7.57 8.0 237
We recommend that you use unleaded fuel
2.5 9.46 10.0 296
because it produces fewer engine deposits and Too much oil will cause excessive smoking and 3.0 11.35 12.0 355
extends the life of exhaust system components. spark plug fouling. Too little oil will cause 3.5 13.24 14.0 414
engine damage or premature wear. 4.0 15.14 16.0 473
Your engine is designed to use any gasoline that 4.5 17.03 18.0 532
has a pump octane number of 91 or higher. Vegetable oils separate from gasoline more easily 5.0 18.92 20.0 591
5.5 20.81 22.0 651
Gasoline pumps at service stations normally than mineral oils, especially in cold weather. It is 6.0 22.71 24.0 710
display the pump octane number. For advisable to use mineral oil when ambient
information on the use of oxygenated fuels, see temperatures below 32°F (0°C) are expected.
page 112.
If the gasoline-oil mixture is left standing in a
Use of lower octane gasoline can cause persistent container for a long period of time, lubricity will
“pinging” or “spark knock” (a louder rapping deteriorate. Use the mixture within 24 hours-or
noise) which, if severe, can lead to engine the time period recommended by the oil
damage. (Light pinging experienced while manufacturer.
operating under a heavy load, such as climbing a
hill, is no cause for concern.) Once an oil container is opened, the oil must be
used within one month, since oxidation may
If pinging or spark knock occurs at a steady occur.
engine speed under normal load, change brands
of gasoline. If pinging or spark knock persists,
consult your Honda dealer.

Never use stale or contaminated gasoline. Avoid

getting dirt, dust, or water in the fuel tank.

34 Servicing Your Honda

 Fuel System
To service the fuel filter:
Refueling Procedure Fuel Line 1. Drain the fuel from the fuel tank into an
approved gasoline container. Disconnect the
Fuel Tank Capacity: 1.35 US gal (5.1 x) fuel line.
(2) 2. Remove the fuel valve (1) by removing the
bolt (2). Wash the fuel filter (3) in high
(3) flash-point cleaning solvent.
(2)
(4)
(1)

(3)

(1) (1)

(1) fuel valve (2) fuel line

(1) fuel fill cap (3) steering stem nut (2)
(2) breather tube 1. Check the fuel valve (1) and fuel filter for
contamination.
1. To open the fuel fill cap (1), pull the breather 2. Check for leaks. (1) fuel valve (3) fuel filter
tube (2) out of the steering stem nut (3). Turn 3. Check the fuel line (2) for cracks, (2) bolt (4) O-ring
the fuel fill cap counterclockwise and remove deterioration, damage, or leakage. Replace the
it. fuel line, if necessary. 3. Reassemble the fuel valve in the reverse order
2. Add fuel until the level reaches the bottom of 4. Check for interference between the frame and of removal. Make sure the O-ring (4) is in
the filler neck. Avoid overfilling the tank. tank and adjust if necessary. place. Install the fuel valve in the fuel tank.
There should be no fuel in the filler neck. Refill the fuel tank.
3. Close the fuel fill cap and insert the breather Attach the fuel line and turn the fuel valve to
tube to the steering stem nut. Fuel Filter ON; check for leaks.

The fuel filter is included in the fuel valve

WARNING mounted on the bottom left side of the fuel tank.
Gasoline is highly flammable and Dirt accumulated in the filter will restrict the
explosive. You can be burned or flow of the fuel to the carburetor.
seriously injured when handling fuel.

• Stop the engine and keep heat, sparks

and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.

Servicing Your Honda 35

Transmission Oil
Refer to Safety Precautions on page 19. • Your CR does not need oil additives. Use the
Oil Recommendation recommended oil.
Using the proper oil, and regularly checking, • Do not use oils with graphite or molybdenum
adding, and changing oil will help extend the API classification SG or higher except oils additives. They may adversely affect clutch
service life of the transmission and clutch. Even (4-stroke engine oil labeled as energy operation.
the best oil wears out. Changing oil helps get rid only) conserving on the circular • Do not use API SH or higher 4-stroke engine
of dirt and deposits. Operating the engine with API service label oils displaying a circular API “energy
old or dirty oil can damage your engine. Viscosity 10W–30 conserving” service label on the container. They
Running the engine with insufficient oil can (weight) (4-stroke engine oil) may affect lubrication and clutch performance.
cause serious damage to the transmission.
JASO T903 MA
standard (4-stroke
engine oil only)

others without friction modifiers as

molybdenum additives

suggested oil* Pro Honda GN4 4-stroke

engine oil or an equivalent*

* Suggested 4-stroke engine oils are equal

performance to SJ oils that are not labeled as NOT RECOMMENDED OK
energy conserving on the circular API service
label. Other viscosities shown in the following chart
may be used when the average temperature in
your riding area is within the indicated range.

36 Servicing Your Honda

 Transmission Oil
JASO T 903 standard
The JASO T 903 standard is an index for engine Checking & Adding Oil Replacing Transmission Oil
oils for 4-stroke motorcycle engines.
There are two classes: MA and MB. 1. Run the engine for three minutes, then shut it
Oil conforming to the standard is labeled on the (1) off.
oil container. 2. Support the CR in an upright position on a
For example, the following label shows the MA level surface.
classfication. 3. Remove the oil filler cap from the right
crankcase cover.
(1) 4. Place an oil drain pan under the engine to
catch the oil. Then remove the oil drain bolt
(1).
(2)
5. Pour the drained oil into a suitable container
(2)
and dispose of it in an approved manner (page
(1) oil filler cap (2) oil check bolt 102).
NOTICE
1. Run the engine for three minutes, then shut it
off. Improper disposal of drained fluids is harmful to
(1) code number of the sales company of the oil 2. Wait three minutes after shutting off the the environment.
(2) oil classification engine to allow the oil to properly distribute
itself in the clutch and transmission. 6. After the oil has drained completely, install
3. Support the CR in an upright position on a the drain bolt with a new sealing washer and
level surface. tighten it to the specified torque:
4. Remove the oil filler cap (1) and oil check 18 lbf·ft (25 N·m, 2.5 kgf·m)
bolt (2) from the right crankcase cover. A 7. Add the recommended oil:
small amount of oil should flow out of the 0.58 US qt (0.55 x) at oil change
check bolt hole. Allow any excess oil to flow 8. Check the oil level by following the steps in
out of the check bolt hole. Checking & Adding Oil.
5. If no oil flows out of the check bolt hole, add
oil slowly through the oil filler hole until oil
starts to flow out of the check bolt hole.
Install the oil check bolt and filler cap.
6. Repeat steps 1 - 4.
7. After inspecting the oil level or adding oil,
tighten the oil check bolt and filler cap
securely and oil check bolt to the specified
torque:
6.6 lbf·ft (9 N·m, 0.9 kgf·m)
(1)

(1) oil drain bolt

Servicing Your Honda 37

Coolant
Your CR’s liquid cooling system dissipates Increasing the concentration of antifreeze is not
engine heat through the coolant jacket that recommended because it decreases cooling WARNING
surrounds the cylinder and cylinder head. system performance. Higher concentrations of Removing the radiator cap while the
antifreeze (up to 60%) should only be used to engine is hot can allow the coolant to
Maintaining the coolant will allow the cooling provide additional protection against freezing. spray out, seriously scalding you.
system to work properly and prevent freezing, Check the cooling system frequently during
overheating, and corrosion. freezing weather. Always let the engine and radiator cool
down before removing the radiator cap.

Coolant Recommendation Checking & Adding Coolant 2. Add coolant up to the filler neck if the level is
low.
Use Pro Honda HP coolant or an equivalent high Refer to Safety Precautions on page 19. Inspect the coolant level before each outing.
quality ethylene glycol antifreeze containing A coolant loss of 0.7 - 2.0 US oz (20 - 60
corrosion protection inhibitors specifically 1. With the engine cold, remove the radiator cap cm3) through the overflow tube is normal. If
recommended for use in aluminum engines. (1) and check coolant level. The coolant level coolant loss is more than this, inspect the
Check the antifreeze container label. is correct when it is at the bottom of the cooling system.
radiator filler neck (2). Capacity:
Use only distilled water as a part of the coolant (1)
0.45 US qt (0.43 x) at disassembly
solution. Water that is high in mineral content or (2) 0.45 US qt (0.43 x) at coolant change
salt may be harmful to the aluminum engine. 3. Install the radiator cap securely.

NOTICE NOTICE
Using coolant with silicate inhibitors may cause If the radiator cap is not installed properly, it
premature wear of radiator pump seals or will cause excessive coolant loss and may result
blockage of radiator passages. Using tap water in overheating and engine damage.
may cause engine damage.

The factory provides a 50/50 solution of

antifreeze and water in this motorcycle. This
coolant solution is recommended for most (1) radiator cap (2) radiator filler neck
operating temperatures and provides good
corrosion protection.

Decreasing the concentration of antifreeze to less

than 40% will not provide proper corrosion
protection.

38 Servicing Your Honda

 Coolant
(1) (4)
Cooling System Inspection Coolant Replacement

1. Check the cooling system for leaks (see the Refer to Safety Precautions on page 19.
Honda Service Manual for troubleshooting of
leaks). Coolant should be replaced by your Honda
2. Check water hoses (1) for cracks, dealer, unless you have the proper tools and
deterioration, and clamp bands for looseness. service data and are mechanically qualified.
3. Check the radiator mount for looseness. Refer to the official Honda Service Manual
4. Make sure the overflow tube (2) is connected (page 120).
and not clogged.
5. Check the radiator fins for clogging.
(2) (3) WARNING
6. Check the water leakage check hole (3) below Removing the radiator cap while the
the water pump cover (4) for leakage. Make (1) water hoses (3) water leakage check hole engine is hot can allow the coolant to
sure the hole remains open. If water leaks (2) overflow tube (4) water pump cover
spray out, seriously scalding you.
through the check hole, the water pump seal is
damaged. If oil leaks through the check hole, Always let the engine and radiator cool
the transmission oil seal is damaged. See the down before removing the radiator cap.
Honda Service Manual or consult your Honda
dealer for replacing the water pump seal or
the transmission oil seal. Both seals should
be replaced at the same time. To properly dispose of drained coolant, refer to
You & the Environment, page 102.

NOTICE
Improper disposal of drained fluids is harmful to
the environment.

Servicing Your Honda 39

Air Cleaner
Refer to Safety Precautions on page 19. 4. Remove the air cleaner (3) from the air
Cleaning cleaner holder (4).
The air cleaner uses polyurethane inner and outer
pieces which can’t be separated. 1. Remove the seat (page 29). (4)
A dirty air cleaner will reduce engine power. 2. Loosen the air cleaner retaining bolt (1).
3. Remove the air cleaner assembly (2).
Proper air cleaner maintenance is very important
(2) (1)
for off-road vehicles. A dirty, water-soaked,
worn-out, or defective air cleaner will allow dirt,
dust, mud, and other impurities to pass into the (3)
engine.

Service the air cleaner more frequently if you

ride in unusually wet or dusty areas. Your Honda (1) air cleaner retaining bolt
dealer can help you determine the correct service (3) air cleaner
(4) air cleaner holder
interval for your riding conditions.
(1) 5. Wash the air cleaner in clean non-flammable
Your CR’s air cleaner has very specific
(high flash point) cleaning solvent such as
performance requirements. Use a new genuine
(1) air cleaner retaining bolt kerosene not gasoline. Then wash it in hot,
Honda air cleaner specified for your model or an
(2) air cleaner assembly soapy water, rinse well, and allow to dry
air cleaner of equal quality.
thoroughly.
The air cleaner is made in two pieces : inner
Proper air cleaner maintenance can prevent
and outer, which can't be separated.
premature engine wear or damage, expensive
6. Inspect for tears or cracks in the foam or
repairs, low engine power, poor gas mileage, and
seams of the air cleaner. Replace the air
spark plug fouling.
cleaner if it is damaged.
7. Clean the inside of the air cleaner housing.
NOTICE 8. Allow the air cleaner to dry thoroughly. After
drying, soak the air cleaner in clean Pro
Improper or lack of proper air cleaner
Honda Foam Filter Oil or an equivalent air
maintenance can cause poor performance and
cleaner oil.
premature engine wear.
Apply air cleaner oil to the entire surface of
the air cleaner and rub it with both hands to
saturate the air cleaner with oil. Squeeze out
excess oil.

40 Servicing Your Honda

 Air Cleaner
9. Apply a thin coat of Pro Honda White NOTICE
Lithium Grease, or an equivalent, to the seal-
ing surface. Improper installation of the air cleaner assembly
10.Assemble the air cleaner and holder and put may allow dirt and dust to enter the engine and
the air cleaner retaining bolt through the cause rapid wear of the piston rings and cylinder.
assembly.
11.Install the assembly into the air cleaner 12.Reinstall the seat (page 29), making sure it is
housing with the tab (5) facing up and tighten securely attached.
the bolt securely.
(5)

(5) tab

Servicing Your Honda 41

Throttle
Refer to Safety Precautions on page 19. 1. Pull the rubber dust cover (2) back. Lower Adjustment
2. Loosen the upper lock nut (3) on the throttle The lower adjuster is used for major freeplay
cable mechanism. adjustment, such as after replacing the throttle
Throttle Freeplay 3. Turn the upper adjuster (4). cables or removing the carburetor. It is also used
Turning the adjuster in direction (–) will if you can not get the proper adjustment with the
RIGHT SIDE (1) decrease freeplay and turning it in direction upper adjuster.
(+) will increase freeplay. (5)
4. Tighten the upper lock nut. Return the rubber
dust cover to its normal position.
5. After adjustment, check for smooth rotation of
the throttle grip from fully closed to fully (+)
(–)
open in all steering positions.
If the adjuster is threaded out near its limit or
the correct freeplay cannot be reached, turn
the adjuster all the way in and back out one (6)
(1) throttle freeplay turn. Tighten the upper lock nut, install the
rubber dust cover and make the adjustment (7)
Inspection with the lower adjuster.
Check freeplay (1).
Freeplay: 1/8 - 1/4 in (3 - 6 mm) (5) rubber cap (+) increase
If necessary, adjust to the specified range. (6) lock nut (–) decrease
(7) adjuster
Upper Adjustment
Minor adjustments are generally made with the 1. Pull up the rubber cap (5) on the carburetor
upper adjuster. cap and loosen the lock nut (6).
2. Turn the adjuster (7) in direction (–) to
(4) decrease freeplay, and in direction (+) to
(2)
increase freeplay.
(+)
3. Tighten the lock nut.
(3)
4. Reinstall the rubber cap securely after
adjustment.
5. Operate the throttle grip to ensure that it
(–) functions smoothly and returns completely.

If you can’t get the freeplay within the specified

range, contact your Honda dealer.

(2) rubber dust cover (+)increase

(3) upper lock nut (–)decrease
(4) upper adjuster

42 Servicing Your Honda

 Throttle
Throttle Inspection

(1)

(1) throttle

1. Check that the throttle assembly is positioned

properly and the securing bolts are tight.
2. Check for smooth rotation of the throttle (1)
from fully open to fully closed in all steering
positions. If there is a problem, see your
Honda dealer.
3. Inspect the condition of the throttle cables
from the throttle grip down to the carburetor.
If the cable is kinked or chafed, have it
replaced.
4. Check the cables for tension or stress in all
steering positions.
5. Lubricate the cables with a commercially-
available cable lubricant to prevent premature
rust and corrosion.

Servicing Your Honda 43

Clutch System
Refer to Safety Precautions on page 19. Cable End Adjustment Lower Adjustment
Minor adjustments are generally made with the The lower clutch cable adjuster is used if the
cable end adjuster. upper clutch cable adjuster is threaded out near
Clutch Freeplay its limit — or the correct freeplay cannot be
obtained.
(2)
(3) (–)
(5)
(1)
(+)
(+)
(4)

(–)

(6)
(2) dust cover (+) increase
(3) lock nut (–) decrease
(1) clutch lever (4) cable end adjuster (5) lock nut (+) increase
(6) lower clutch cable adjuster (–) decrease
Inspection 1. Pull the dust cover (2) back.
Check freeplay. 2. Loosen the lock nut (3) and turn the cable end 1. Turn the cable end adjuster all the way in (to
Freeplay: 3/8 - 13/16 in (10 - 20 mm) adjuster (4). Turning the adjuster in direction provide maximum freeplay) and back one
(–) will decrease freeplay and turning in the turn.
If necessary, adjust to the specified range. direction (+) will increase freeplay. 2. Loosen the lock nut (5).
Improper freeplay adjustment can cause 3. After adjustment, tighten the lock nut and 3. Turn the lower clutch cable adjuster (6) to
premature clutch wear. install the dust cover. obtain the specified freeplay.
4. Check the freeplay again. 4. Tighten the lock nut. Check the adjustment.

44 Servicing Your Honda

 Clutch System
5. Start the engine, pull the clutch lever in, and
shift into gear. Make sure the engine does not Other Inspections & Lubrication Clutch Operation
stall and the motorcycle does not creep.
Gradually release the clutch lever and open • Check that the clutch lever assembly is 1. Check for smooth clutch lever operation. If
the throttle. Your CR should move smoothly positioned properly and the securing bolts are necessary, lubricate the clutch lever pivot or
and accelerate gradually. tight. clutch cable.
• Check the clutch cable for kinks or signs of 2. Check the clutch cable for deterioration,
If you can’t get proper adjustment, or the clutch wear. If necessary, have it replaced. kinks, or damage.
does not work properly, the cable may be kinked • Lubricate the clutch cable with a commercially-
or worn, or the clutch discs may be worn. See available cable lubricant to prevent premature
your Honda dealer or refer to page 120 the wear and corrosion.
official Honda Service Manual.

Servicing Your Honda 45

Spark Plug
Refer to Safety Precautions on page 19. 1. Remove the spark plug cap and spark plug. 6. Tighten the spark plug:
2. Measure spark plug gap (1) with a feeler • If the old plug is good:
gauge, and adjust by carefully bending the 1/8 turn after it seats.
Spark Plug Recommendation side electrode (2). • If installing a new plug, tighten it twice to
The recommended spark plug gap is: prevent loosening:
The recommended standard spark plug is 0.02 - 0.03 in (0.6 - 0.7 mm) a) First, tighten the plug:
satisfactory for most racing conditions. 3. Check the electrode for wear or deposits, the NGK: 3/4 turn after it seats.
sealing gasket (3) for damage, and the b) Then loosen the plug.
Standard BR10EG (NGK) insulator for cracks. c) Next, tighten the plug again:
1/8 turn after it seats.
(2)
Use only the recommended type of spark plugs in
the recommended heat range. (1) NOTICE
(3)
NOTICE An improperly tightened spark plug can damage
the engine. If a plug is too loose, a piston may be
Using spark plugs with an improper heat range damaged. If a plug is too tight, the threads may
or incorrect reach can cause engine damage. be damaged.
Using a non-resistor spark plug may cause
ignition problems.
(4)

(1) spark plug gap (3) sealing gasket

(2) side electrode

4. To obtain accurate spark plug readings,

accelerate up to speed on a straightaway.
Push the engine stop button and disengage the
clutch by pulling the lever in.
If you’re using a new plug, ride for at least 10
minutes before taking a plug reading; a (4) spark plug
brand-new plug will not color initially.
5. Coast to a stop, then remove and inspect the 7. Reinstall the spark plug cap. Take care to
spark plug. The porcelain insulator around avoid pinching any cables or wires.
the center electrode should appear tan or
medium gray.
If the electrodes appear burnt, or the insulator
is white or light gray (lean) or the electrodes
and insulator are black or fouled (rich), there
is a problem elsewhere (page 94). Check the
fuel/oil mixture, carburetor and fuel system,
and ignition timing.

46 Servicing Your Honda

 Cylinder System
Refer to Safety Precautions on page 19.
Cylinder Removal Reed Valve Removal
Cylinder Head Removal 1. Remove the following: 1. Drain the radiator coolant (page 39).
– expansion chamber (page 67). 2. Remove the carburetor (page 92).
Clean the area above the engine before disassembly – cylinder head 3. Remove the radiator hose of the cylinder
to prevent dirt falling into the engine. – carburetor (page 92). head.
2. Disconnect the radiator hoses. 4. Loosen the carburetor insulator mounting
3. Loosen the lower clutch cable adjuster (1).
1. Drain the radiator coolant (page 39). 4. Remove the cylinder mounting nuts (2). bolts (1) in a criss-cross pattern in 2 or 3
2. Turn the fuel valve OFF. 5. Remove the cylinder (3). Do not pry on or steps.
3. Remove the seat and fuel tank (pages 29,30). strike the cylinder. 5. Remove the insulator (2) and reed valve (3)
4. Remove the radiator hoses (1). 6. Place a clean shop towel in the crankcase to from the cylinder by removing the
5. Disconnect the spark plug cap (2) and remove keep debris out. carburetor insulator mounting bolts and clamp
the spark plug (3). 7. Remove the reed valve (4) from the cylinder (4).
6. Remove the cylinder head nuts (4) using the and replace the gasket. 6. Remove the gasket (5).
technique described below, and remove the (3)
cylinder head (5). (1)
(4) (4) (2)
(3)
To avoid warping the cylinder head, use a (1)
crisscross pattern to loosen each nut about
(5)
1/4, then remove the nuts.

7. Remove the cylinder head gasket.

(2)
(1) (2)
(1) lower clutch cable adjuster
(2) cylinder mounting nuts
(3) (3) cylinder (4) reed valve

(1) carburetor insulator (4) clamp

mounting bolts (5) gasket
(2) insulator
(3) reed valve
(5)

(4)
(1) radiator hoses (4) cylinder head nuts
(2) spark plug cap (5) cylinder head
(3) spark plug

Servicing Your Honda 47

Cylinder System
Piston Removal Cylinder Head/Cylinder Decarbonizing Connecting Rod Inspection

1. Place the shop towel in the crankcase. 1. Remove the carbon deposits from the cylinder 1. Remove the shop towel.
2. Using a pair of needle-nose pliers, carefully head (1) and piston dome. 2. Install the bearing and piston pin (1) in the
remove the piston pin clip (1). Avoid letting it Take care to avoid scratching the cylinder connecting rod small end and check for
fall into the crankcase. head piston dome, or the head gasket surface. excessive play while holding the connecting
3. Support the piston (2) and press the piston pin rod. If it feels loose, replace the piston pin
(3) out of the piston. Remove the piston. and small end bearing.
(1) (1)
Under racing conditions, the piston and rings
should be replaced after 7.5 hours of running.
Replace the piston pin and connecting rod small
end bearing after 22.5 hours of running.

(2) (3)
(1)

(4) (1) cylinder head

(1) piston pin
2. Clean carbon deposits from the exhaust port (2)
area. 3. Place the shop towel back in the crankcase.

Cylinder Head Inspection

(2)
Check the cylinder head (1) for warpage in
(1) piston pin clip (3) piston pin diagonal directions with a straight edge (2) and a
(2) piston (4) piston ring feeler gauge (3).
Service Limit: 0.004 in (0.10 mm)
4. Spread the piston ring (4) and remove by
lifting it up at a point just opposite the gap.
(2) exhaust port
NOTICE
The piston rings may be damaged if their ends
Cylinder/Piston/Piston Pin/Piston Ring
are spread too far.
Inspection (2)

We recommend you consult the Service Manual

or your Honda dealer for correct Service Limit
measurements. (1) (3)
(1) cylinder head (3) feeler gauge
(2) straight edge

48 Servicing Your Honda

 Cylinder System
4. Install and tighten the mounting screws to the
Reed Valve Inspection specified torque: (3)
(2)
0.7 lbf·ft (1 N·m, 0.1 kgf·m)
1. Check the reed valves (1) for damage or 5. Make sure that the clearance between the reed (1)
fatigue and replace them if necessary. valve (3) and body (5) is less than the 0.008 in
2. Replace the reed valves with new ones if the (0.2 mm).
(3)
seats are cracked or damaged.

(5)

(1) piston pin (3) piston pin clip

(2) “IN” mark
(3) reed valve (5) body
(1)
(1) reed valves Reed Valve Installation
Piston Installation
Reed Valve Disassembly/Assembly 1. Replace the insulator o-ring (1) and reed valve
1. Clean the piston ring groove. gasket (2) with new ones.
1. Remove the reed valve mounting screws (1), 2. Lubricate the piston ring and piston ring
stopper (2) and reed valve (3). groove with clean 2-stroke oil. (1)
2. Align the cut-outs (4) between the reed valves 3. Install the piston rings on the piston with the
and stoppers, then install them onto the body marks facing up. (2)
(5). Locate the piston ring end gaps on the pins in
3. Apply a locking agent to the reed valve the ring grooves.
mounting screw threads. 4. Lubricate the small end bearing and piston pin
(2) (3) (1) with clean 2-stroke oil.
(1)
5. Install the connecting rod small end bearing,
piston and piston pin.
Install the piston with the “IN” mark (2)
facing the intake side.
If the “IN” mark is not found on the piston, (1) insulator o-ring (2) reed valve gasket
install the piston with the hole facing the
intake side.
6. Install new piston pin clips (3) (Never reuse
old clips.)
(4)
Take care so that the clips do not fall into the
(1) read value mounting screws (3) reed valve crankcase.
(2) stopper (4) cut-outs Do not align the piston pin clip end gap with
the piston cut-out. (cont’d)

Servicing Your Honda 49

Cylinder System
2. Install the gasket to the crankcase. 5. Install the four flange nuts (4) and tighten to
3. Install the reed valve assembly, insulator and (1) the specified torque in a crisscross pattern in 2
clamp to the crankcase. or 3 step.
4. Install the four carburetor insulator mounting 20 lbf·ft (27 N·m, 2.8 kgf·m)
bolts (3) and tighten to the specified torque in Be careful not to overtighten the mounting
a crisscross pattern: nuts-this is the most common cause for leaks
6.6 lbf·ft (9 N·m, 0.9 kgf·m) here.

After installation, check for secondary air leaks

around the reed cage and insulator. (4)

(2)
(1) cylinder base gasket (2) dowel pins
(3)
4. Lubricate the piston and ring with 2-stroke
oil. Align the ring end gap with the piston ring
pin in the ring land and slip the cylinder over
the piston while compressing the piston ring
(3).
(4) flange nuts
NOTICE
6. Install the following:
Do not rotate the cylinder, since this may – expansion chamber (page 67)
cause the piston ring to snag a cylinder port – carburetor (page 92)
(3) carburetor insulator mounting bolts and break.
5. Install the radiator hose.
6. Install the carburetor (page 92).
(3)

Cylinder Installation

1. Clean off any gasket material from the gasket

surface of the crankcase, being careful not to
let any material fall into the crankcase.
Be careful not to remove any metal from the
gasket surface.
2. Remove the shop towel. Do not let any gasket
debris fall into the crankcase. (3) piston ring
3. Place the cylinder base gasket (1) and dowel
pins (2) on the crankcase. Before tightening the cylinder nuts, make sure
that there is no clearance between the cylinder
and crankcase mating surface.

50 Servicing Your Honda

 Cylinder System
3. Install the cylinder head (4) and tighten the 4. Install the spark plug and spark plug cap (6).
Cylinder Head Installation four cylinder head nuts (5) to the specified 5. Connect the radiator hoses (7) to the cylinder
torque in a crisscross pattern in 2 or 3 steps. head.
1. Clean the cylinder head mating surface. 20 lbf·ft (27 N·m, 2.8 kgf·m)
(6)
2. Install the new cylinder head gasket (1) with (5)
its “UP” mark (2) facing up and locating tab
(3) facing rearward.

(7)
(2)

(4) (7)

(4) cylinder head (5) cylinder head nuts (6) spark plug cap (7) radiator hoses

(3) 6. Pour the recommended coolant mixture into

(1)
the radiator up to the correct level (page 38).
7. Start the engine and check for the following:
(1) cylinder head gasket (3) tab – compression leaks
(2) “UP” mark – abnormal engine noise
– carburetor insulator air leaks
– coolant leaks

Servicing Your Honda 51

Suspension
Refer to Safety Precautions on page 19. • If you become confused about adjustment (4)
settings, return to the standard position and 0.06 in (1.5 mm)
Loose, worn, or damaged suspension components start over.
may adversely affect the handling and stability of • If the fork is still too stiff/soft after adjusting
your motorcycle. If any suspension components compression damping, determine which
appear worn or damaged, see your Honda dealer portion of the travel is still too stiff/soft. This
for further inspection. Your dealer is qualified to is an important step that will help you solve
determine whether or not replacement parts or suspension problems. (3)
repairs are needed. (3)
1. Make sure that the fork protectors (1) and dust
seals (2) are clean and not packed with mud
Front Suspension Inspection and dirt.
2. Check for signs of oil leakage. Damaged or (3) wear ring (4) outer tube
• When your CR is new, break it in for leaking fork seals should be replaced before
approximately one hour to ensure that the your CR is ridden.
suspension has worked in (page 16). (3)
• After break-in, test run your CR with the front
suspension at the standard setting before (2)
attempting any adjustments.
• For optimum fork performance, we
recommend that you disassemble and clean
the fork after riding your CR for three hours.
See page 72 for fork disassembly.
• Replace the fork oil every three races or 7.5
hours of running. See page 54 for oil level (1)
(3) wear rings
adjustment after changing the fork oil.
• Use Pro Honda HP Fork Oil 5W or an 4. Make a quick check of fork operation by
equivalent which contains special additives to locking the front brake and pushing down on
assure maximum performance of your CR’s (1) fork protector (2) dust seal
the handlebar several times.
front suspension.
• Periodically check and clean all front 3. Inspect the wear rings (3) for wear or damage.
suspension parts to assure top performance. Replace the wear ring if it is 0.06 in (1.5 mm)
Check the dust seals for dust, dirt, and foreign or flat with the outer tube (4).
materials. Check the oil for any When replacing the wear ring, remove the
contamination. fork leg (page 72).
• Refer to Suspension Adjustment Guide lines Install the wear ring with its end gap facing
(page 85). Make all rebound and rearward.
compression damping adjustments in one-
click increments. (Adjusting two or more
clicks at a time may cause you to pass over
the best adjustment.) Test ride after each
adjustment.

52 Servicing Your Honda

 Suspension
1. Bounce the rear of the motorcycle up and down
Rear Suspension Inspection and check for smooth suspension action.

The swingarm is controlled by one hydraulic

shock absorber with an aluminum reservoir for
oil and nitrogen gas pressure The gas pressure in
the reservoir is contained within a rubber bladder.

The shock absorber’s spring pre-load and damp-

ing adjustments (compression and rebound)
should be adjusted for the rider’s weight and
track conditions (page 84).

Do not attempt to disassemble, service, or

dispose of the damper; see your Honda dealer.
The instructions found in this owner’s manual are
limited to adjustments of the shock assembly only.
2. Remove the subframe (page 32).
• When your CR is new, break it in for 3. Check for a broken or collapsed spring.
approximately one hour with the standard 4. Check the rear shock absorber (1) for a bent
suspension settings before attempting to shaft or oil leaks.
adjust the rear suspension.
• Make all compression and rebound damping
adjustments in one-click increments. (1)
(Adjusting two or more clicks at a time may
cause you to pass over the best adjustment.)
Test ride after each adjustment.
• If the rear suspension is too stiff/soft, adjust it
by turning both the compression and rebound
damping adjusters in one-click increments
until the suspension feels approximately
"right." (Turning just one adjuster, rather than
both, may cause a loss of balance between
compression and rebound damping.) After
adjusting both adjusters simultaneously, (1) rear shock absorber
suspension may be fine-tuned by turning
either the compression or rebound damping 5. Push the rear wheel sideways to check for
adjuster in one-click increments. worn or loose swingarm bearings. There
• If you have a problem finding an acceptable should be no movement. If there is, have the
adjustment, return to the standard position and bearings replaced by your Honda dealer.
begin again.

Servicing Your Honda 53

Suspension
3. Pour half of the recommended fork oil into 4. Raise the fork tube (2) and cover the top of
Fork Oil Recommended the fork slider and fork tube. the tube with your hand. Compress the fork
tube fully, then release your hand. Use your
other hand to secure the fork tube. Repeat
viscosity (weight) 5 W this procedure three times.
suggested oil Pro Honda HP Fork Oil or equiva-
lent

Fork Oil Change (2)

1. Remove the fork cap, and fork spring as

described in Front Suspension Oil Level
(page 72).
2. Pour out the fork oil by pumping the fork tube
and piston rod (1) eight-ten times with the rod
end down as shown.
(2) fork tube
(1)
5. Pour the remaining fork oil into the piston rod
until a little oil flows out of the top of the rod.
Pump the piston rod slowly eight-ten times
through a stroke of 10 in (25 cm). Gently
slide the fork tube down onto the lower end of
the slider pipe (3).
Wait about 5 minutes.

(1)
(2)
(1) piston rod
(2)

(3)

(1) piston rod (3) lower end of the slider

(2) fork tube pipe

54 Servicing Your Honda

 Suspension
6. With the fork tube held upright, measure the Fork Oil Level (CR85R) Optional Stiffer (0.30 kgf/mm) Fork Spring
oil level (4) from the top of the tube.  2-coils at one end; 
Standard (0.28 kgf/mm) Fork Spring
 1-coil at other end 
 1-coil at both ends 
  Standard oil 3.9 in
 (factory products)  level 99 mm
  [capacity] 12.1 US oz
(4) (358 cm3)
Standard oil 4.0 in
level 101 mm Maximum oil 3.7 in Slightly stiffer as
[capacity] 12.1 US oz level 93 mm it nears full
(357 cm3) [capacity] 12.2 US oz compression.
(362 cm3)
Maximum oil 3.7 in Slightly stiffer as
level 95 mm it nears full Minimum oil 4.1 in Slightly softer as
[capacity] 12.2 US oz compression. level 104 mm it nears full
(361 cm3) [capacity] 12.0 US oz compression.
(355 cm3)
Minimum oil 4.2 in Slightly softer as
(4) oil level
level 106 mm it nears full
[capacity] 12.0 US oz compression.
7. Adjust the oil level by adding or removing the (354 cm3)
oil with an after market syringe (5).
Optional Softer (0.26 kgf/mm) Fork Spring
 2-coils at both ends 
 

Standard oil 3.9 in

(5) level 99 mm
[capacity] 12.1 US oz
(358 cm3)

Maximum oil 3.7 in Slightly stiffer as

level 93 mm it nears full
[capacity] 12.2 US oz compression.
(362 cm3)

Minimum oil 4.1 in Slightly softer as

level 104 mm it nears full
(5) syringe [capacity] 12.0 US oz compression.
(355 cm3)

(cont’d)

Servicing Your Honda 55

Suspension
Fork Oil Level (CR85RB) Optional Stiffer (0.30 kgf/mm) Fork Spring

Standard (0.28 kgf/mm) Fork Spring  2-coils at one end; 

 1-coil at other end 
 1-coil at both ends 
  Standard oil 4.1 in
 (factory products)  level 105 mm
  [capacity] 12.0 US oz
(354.2 cm3)
Standard oil 4.0 in
level 102 mm Maximum oil 4.0 in Slightly stiffer as
[capacity] 12.0 US oz level 102 mm it nears full
(356 cm3) [capacity] 12.1 US oz compression.
(356.6 cm3)
Maximum oil 3.7 in Slightly stiffer as
level 95 mm it nears full Minimum oil 4.3 in Slightly softer as
[capacity] 12.2 US oz compression. level 110 mm it nears full
(361.4 cm3) [capacity] 11.9 US oz compression.
(351.5 cm3)
Minimum oil 4.2 in Slightly softer as
level 106 mm it nears full
[capacity] 12.0 US oz compression. Be sure to check the oil level. Some oil will be
(353.5 cm3) left in the fork tube when the oil is drained and
causes the oil level to be raised slightly.
Optional Softer (0.26 kgf/mm) Fork Spring Be sure the oil level is the same in both fork legs.
If a syringe is not available, first set the oil level
 2-coils at both ends 
  somewhat lower than normal, then add small
amounts of oil until the correct level is obtained,
Standard oil 3.8 in measuring the level each time oil is added.
level 96 mm
[capacity] 12.2 US oz 8. Install the fork spring, spring seat.
(360.4 cm3)

Maximum oil 3.6 in Slightly stiffer as

level 92 mm it nears full
[capacity] 12.3 US oz compression.
(362.8 cm3)

Minimum oil 3.9 in Slightly softer as

level 100 mm it nears full
[capacity] 12.1 US oz compression.
(358.5 cm3)

56 Servicing Your Honda

 Brakes
Refer to Safety Precautions on page 19. 1. Loosen the lock nut (1).
2. To position the brake lever farther away from Rear Brake Pedal Height
Both the front and rear brakes are the hydraulic the handgrip, turn the adjuster (2) clockwise.
disc type. As the brake pads wear, the brake To position the brake lever closer to the The brake pedal height should be approximately
fluid level will drop. A leak in the system will handgrip, turn the adjuster counterclockwise. level with the right footpeg.
also cause the level to drop. 3. Tighten the lock nut.
4. Apply the brake, release it, then spin the 1. Loosen the lock nut (1) and turn the adjusting
Frequently inspect the system to ensure there are wheel and check that it rotates freely. Repeat bolt (2) in direction (+) to raise the pedal (3)
no fluid leaks. Periodically inspect the brake this procedure several times. or in direction (–) to lower it.
fluid level and the brake pads for wear. 5. Check freeplay by pulling in slowly on the 2. Tighten the lock nut at the desired pedal
front brake lever until the brake starts to height.
If the front brake lever or rear brake pedal engage.
freeplay does not feel within the normal range Freeplay: 3/8 - 13/16 in (10 - 20 mm)
while riding, check the brake pads. If they are 6. Apply grease to the contacting faces of the
not worn beyond the recommended limit (page adjuster and piston (3).
60), there is probably air in the brake system.
Refer to the Honda Service Manual or see your (2)
Honda dealer to have the air bled from the
system.
(–)
(+)
Front Brake Lever Adjustment (3)
(1)

(1) lock nut (+) raises the pedal height

(2)
(1) (2) adjusting bolt (–) lowers the pedal height
(3) rear brake pedal

LESS
THAN
0.8 in
(20 mm)

(+) (–)
(3)

(1) lock nut (+) increase

(2) adjuster (–) decrease
(3) piston

Servicing Your Honda 57

Brakes
Rear Brake Fluid Level Check
Fluid Level Inspection

Front Brake Fluid Level Check

(1)

(1)

(1) LOWER level mark

With the motorcycle in an upright position, check

(1) LWR (lower) level mark the fluid level.
It should be above the LOWER level mark (1). If
With the motorcycle in an upright position, check the level is at or below the LOWER level mark,
the fluid level. check the brake pads for wear (page 60).
It should be above the LWR (lower) level mark Worn brake pads should be replaced. If the pads
(1). If the level is at or below the LWR level are not worn, have your brake system inspected
mark, check the brake pads for wear (page 60). for leaks.
Worn brake pads should be replaced. If the pads If the brake pedal freeplay exceeds 1.2 in
are not worn, have your brake system inspected (30 mm), there is probably air in the brake
for leaks. system and it must be bled. Refer to the Honda
If the brake lever freeplay exceeds 0.8 in Service Manual or see your Honda motorcycle
(20 mm), there is probably air in the brake dealer for brake bleeding.
system and it must be bled. Refer to the Honda
Service Manual or see your Honda motorcycle
dealer for brake bleeding.

58 Servicing Your Honda

 Brakes
Adding Front Brake Fluid Adding Rear Brake Fluid Other Inspection
• Make sure there are not fluid leaks.
The recommended brake fluid is Pro Honda DOT The recommended brake fluid is Pro Honda DOT • Check for deterioration or cracks in the hoses
4 brake fluid from a sealed container, or an 4 brake fluid from a sealed container, or an and fittings.
equivalent. equivalent.
When adding brake fluid be sure the reservoir is When adding brake fluid be sure the reservoir is
horizontal before the cap is removed or brake horizontal before the cap is removed or brake
fluid may spill out. fluid may spill out.
(2)
(1) (1)
(3)
(2)
(3)
(4)
(4)

(1) screws (3) diaphragm (1) reservoir cap (3) diaphragm

(2) reservoir cap (4) upper level mark (2) set plate (4) UPPER level mark

1. Remove the screws (1), reservoir cap (2) and 1. Remove the reservoir cap (1), set plate (2) and
diaphragm (3). diaphragm (3).
2. Fill the reservoir with DOT 4 brake fluid to 2. Fill the reservoir with DOT 4 brake fluid to
the upper level mark (4). Do not overfill. the UPPER level mark (4). Do not overfill.
3. Reinstall the diaphragm and reservoir cap. 3. Reinstall the diaphragm and reservoir cap.
4. Tighten the screws to the specified torque: 4. Tighten the bolts securely.
1.1 lbf·ft (1.5 N·m, 0.2 kgf·m)

Servicing Your Honda 59

Brakes
Rear Brake Pads
Brake Pad Wear Inspect the brake pads (1) from the rear side of
the caliper to determine the pad wear. If either
Brake pad wear depends on the severity of usage pad is worn anywhere to a thickness of 0.04 in
and track conditions. (Generally, the pads will (1 mm), both pads must be replaced.
wear faster on wet and dirty tracks) Inspect the
brake pads at each regular maintenance interval
(1)
(page 21).

Front Brake Pads

Inspect the brake pads (1) through the front
wheel to determine the pad wear. If either pad is
worn anywhere to a thickness of 0.04 in (1 mm),
both pads must be replaced.
(1)

(1)
(2)
(1) brake pads
(2) wear limits

Other Inspections

Check that the front brake lever and rear brake

pedal assemblies are positioned properly and the
securing bolts are tight.
(2)
Make sure there are no fluid leaks. Check for
deterioration or cracks in the hoses and fittings.
(1) brake pads
(2) wear limits

60 Servicing Your Honda

 Wheels
Refer to Safety Precautions on page 19. 2. Tighten, any loose spokes and rim locks (3) to
the specified torque:
Maintenance of spoke tension and wheel trueness Spoke: 2.7 lbf·ft (3.7 N·m, 0.4 kgf·m)
(roundness) is critical to safe motorcycle Rim Lock: 9 lbf·ft (12.4 N·m, 1.3 kgf·m)
operation. During the first 100 miles (150 km), 3. Check wheel rim runout. If runout is
spokes will loosen more rapidly due to the initial noticeable, see the Honda Service Manual for
seating of the parts. Excessively loose spokes inspection instructions.
may result in instability at high speeds and the
possible loss of control. It’s also important that
the rim locks are secure to prevent tire slippage. Axles & Wheel Bearings

It is not necessary to remove the wheels to See the Honda Service Manual for inspection
perform the recommended service in the information:
Maintenance Schedule. However, information
for wheel removal is provided for emergency 1. Check the axle for runout.
situations. 2. Check the condition of the wheel bearings.

Wheel Rims & Spokes

(2)

(1)
(3)

(1) wheel rim (3) rim lock

(2) spoke

1. Inspect the wheel rims (1) and spokes (2) for

damage.

Servicing Your Honda 61

Tires & Tubes
Refer to Safety Precautions on page 19. Always check air pressure when your tires are • Inspect carefully for bumps or bulges in the
“cold.” If you check air pressure when your tires side of the tire or the tread. Replace any tire
To safely operate your CR, the tires must be the are “warm” — even if your CR has only been that has a bump or bulge.
proper type (off-road) and size, in good condition ridden for a few miles — the readings will be • Look closely for cuts, slits, or cracks in the
with adequate tread, and correctly inflated. higher. If you let air out of warm tires to match tires. Replace a tire if you can see fabric or
the recommended cold pressures, the tires will be cord.
WARNING underinflated. • Check for rocks or other objects embedded in
The correct “cold” tire pressures are: the tire or tread. Remove any objects.
Using tires that are excessively worn or
• Measure tread depth (1). Replace the tire
improperly inflated can cause a crash in
before depth at the center reaches 0.12 in (3
which you can be seriously hurt or killed. Front 15 psi (100 kPa, 1.0 kgf/cm2)
mm), or any time you notice a reduction in
Rear 15 psi (100 kPa, 1.0 kgf/cm2) traction.
Follow all instructions in this owner’s
• Check the position of both valve stems. A
manual regarding tire inflation and
If you decide to adjust tire pressures for a tilted valve stem indicates the tube is slipping
maintenance.
particular riding condition, make changes a little inside the tire or the tire is slipping on the
at a time. rim.

The following pages give detailed information on

how and when to check your air pressure, how to Inspection Tube Replacement
inspect your tires for wear and damage, and our
recommendations on tire repair and replacement. Take time to inspect your tires and wheels before If a tube is punctured or damaged, you should
you ride. replace it as soon as possible. A repaired tube
may not have the same reliability as a new one,
Air Pressure and it may fail while you are riding.

Properly inflated tires provide the best (1) Use a replacement tube equivalent to the original.
combination of handling, tread life, and riding
comfort. Generally, underinflated tires wear
unevenly, adversely affect handling, and are more
likely to fail from being overheated.
Underinflated tires can also cause wheel damage
on hard terrain. Overinflated tires make your
motorcycle ride harshly, are more prone to
damage from surface hazards, and wear unevenly.

Make sure the valve stem caps are secure. If (1) tire tread depth
necessary, install a new cap.

62 Servicing Your Honda

 Tires & Tubes
Tire Replacement

The tires that came on your CR were designed to

provide a good combination of handling, braking,
durability, and comfort across a broad range of
riding conditions.

70/100-17 40M
Front
DUNLOP K490G

CR85R 90/100-14 49M

Rear
DUNLOP K695

Tire type bias-ply, tube

70/100-19 42M
Front
DUNLOP K490

CR85RB 90/100-16 52M

Rear
DUNLOP K695

Tire type bias-ply, tube

• Use a replacement tire equivalent to the

original.
• Replace the tube any time you replace a tire.
The old tube will probably be stretched and, if
installed in a new tire, could fail.

Servicing Your Honda 63

Drive Chain
Refer to Safety Precautions on page 19.
(1) (4)
The service life of the chain depends on proper
lubrication and adjustment. Poor maintenance
can cause premature wear or damage to the drive (2)
chain or sprockets. (1)

When the motorcycle is ridden on unusually

dusty or muddy tracks, more frequent
maintenance will be necessary.
(3)
Before servicing your drive chain, turn the engine
OFF, raise the rear wheel off the ground by (1) drive chain slack (3) driven sprocket (4) chain slider
placing the optional workstand or equivalent (2) drive sprocket
support under the engine and check that your 6. Check the chain guide slider (5) for wear.
transmission is in neutral. 3. Check drive chain slack at several points Replace the guide slider if the chain is visible
along the chain. The slack should remain through the wear inspection window (6).
constant. If it isn’t, some links may be kinked
Inspection and binding. Lubricating the chain will often
eliminate binding and kinking.
1. Turn the engine off, raise the rear wheel off
the ground by placing the optional workstand NOTICE
or equivalent support under the engine and
shift the transmission into neutral. Excessive chain slack may allow the drive chain
2. Check slack (1) in the upper drive chain run to damage the engine cases.
midway between the sprockets (2)(3). Drive
chain slack should allow the following vertical 4. Inspect the drive chain for: (5)
movement by hand: • damaged rollers
1-3/4—2-3/16 in (45 - 55 mm) • loose pins
• dry or rusted links (6)
• kinked or binding links (5) chain guide slider (6) inspection window
• excessive wear
7. Check the drive chain roller (7) for wear.
Replace the drive chain (page 65) if it has Replace it if necessary.
damaged rollers, loose pins, or kinks that cannot Roller: 0.7 in (18 mm)
be freed. Lubricate the drive chain (page 65) if it
appears dry or shows signs of rust. Lubricate any
kinked or binding links and work them free.
Adjust chain slack if needed.

5. Check the chain slider (4) for wear.

If the wear is 0.16 in (4 mm) or more, replace
it.
64 Servicing Your Honda
 Drive Chain
3. Tighten the rear axle nut to the specified
torque: Removal, Cleaning & Replacement
65 lbf·ft (88 N·m, 9.0 kgf·m)
Tighten the lock nut by holding the adjusting For maximum service life, the drive chain should
nut with a wrench. be cleaned, lubricated, and adjusted before each
4. Recheck chain slack and adjust as necessary. outing.

1. Remove the master link retaining clip (1) with

(7)
Lubrication pliers. Do not bend or twist the clip. Remove
the master link (2). Remove the drive chain.
(7) drive chain roller Commercially prepared drive chain lubricants
may be purchased at most motorcycle shops and (2) (1)
8. Check the driven sprocket nut torque values should be used in preference to motor oil. Pro
after each race. Honda Chain Lube or an equivalent, or SAE 80
24 lbf·ft (32 N·m, 3.3 kgf·m) or 90 gear oil is recommended.

Saturate each chain joint so that the lubricant

Adjustment penetrates the space between adjacent surfaces of
the link plates and rollers.
1. Loosen the rear axle nut (1).
2. Loosen both the lock nuts (2) and turn the
adjusting nuts (3) counterclockwise to
decrease slack or clockwise to increase slack. (1) retaining clip (2) master link
Align the index marks (4) of the axle plates
with the same reference marks (5) on both 2. Clean the drive chain in high flash-point
sides of the axle plates. solvent and allow it to dry.
3. Inspect the drive chain for possible wear or
(1) damage. Replace the drive chain if it has
damaged rollers, loose or tight fitting links, or
(4) otherwise appears unserviceable.

Replacement chain: RK420MSZ1

(3)
(5)
(2)
(1) rear axle nut (4) index mark
(2) lock nut (5) reference marks
(3) adjusting nut

(cont’d)

Servicing Your Honda 65

Drive Chain
4. Inspect the drive and driven sprocket teeth for 5. Measure a section of the drive chain to
wear or damage. We recommend replacing determine whether the chain is worn beyond More About: Drive Chain
the sprocket whenever a new chain is its service limit. Put the transmission in gear,
installed. and then turn the rear wheel forward until the • The master link is the most critical element of
Both chain and sprockets must be in good lower section of the chain is pulled taut. With drive chain security. Master links are
condition, or the new replacement chain or the chain held taut and any kinked joints reusable, as long as they remain in excellent
sprocket(s) will wear rapidly. straightened, measure the distance between a condition. We recommend installing a new
Excessively worn sprocket teeth have a span of 21 pins, from pin center to pin center. master link retaining clip when the drive
hooked, worn appearance. Replace any If the measurement exceeds the service limit, chain is reassembled.
sprocket which is damaged or excessively replace the chain. After the chain is • You may find it easier to install a new chain
worn. measured, shift the transmission into neutral by connecting it to the old chain with a
again before proceeding with inspection and master link and pulling the old chain to
Damaged Sprocket Worn sprocket service. position the new chain on the sprockets.
Teeth teeth
Replacement chain: RK420MSZ1

REPLACE Service limit: 10.20 in (259.0 mm)

REPLACE

Normal Sprocket Teeth

GOOD
MEASURE A SPAN OF 21 PINS (20 PITCHES)
NOTICE
Use of a new chain with worn sprockets will 6. Lubricate the drive chain (page 65).
cause rapid chain wear. 7. Pass the chain over the sprockets and join the
ends of the chain with the master link. For
ease of assembly, hold the chain ends against
adjacent rear sprocket teeth while inserting
the master link. Install the master link
retaining clip so that the closed end of the clip
will face the direction of forward wheel
rotation.
8. Recheck chain slack and adjust as necessary.

66 Servicing Your Honda

 Expansion Chamber
Refer to Safety Precautions on page 19.
Expansion Chamber Removal Expansion Chamber/Installation
Expansion Chamber Inspection 1. Remove the expansion chamber by removing 1. Inspect the O-rings (1). Replace the O-rings
the expansion chamber spring (1) and if they are damaged or otherwise appear
1. Check the expansion chamber spring, and mounting bolts (2). unserviceable.
replace it if it is damaged or stretched. 2. Remove carbon deposits from the head pipe 2. Install the O-rings and washer (2) as shown.
2. Check the flange bolts for tightness. of the expansion chamber. If necessary apply grease to the washer.
3. Check the expansion chamber for cracks or 3. Install the expansion chamber (3), expansion
deformation. (2) (2) chamber spring (4) and mounting bolts (5).
A damaged chamber may decrease engine
performance. Tighten the front and rear mounting bolts to
the specified torque:
6.5 lbf·ft (8.8 N·m, 0.9 kgf·m)
(1)
(3)
(1) (2)

(4)

(1) expansion chamber spring (2) mounting bolts

(5)

(1) O-rings (4) expansion chamber

(2) washer spring
(3) expansion chamber (5) mounting bolts

Servicing Your Honda 67

Additional Maintenance Procedures
Refer to Safety Precautions on page 19.
Control Cables
Steering Stem Inspection Periodically, disconnect the throttle and clutch
cables at their upper ends. Thoroughly lubricate
1. With your CR on a box or workstand (front the cable pivot points with a
wheel elevated), turn the handlebar to the commercially-available cable lubricant. If the
right and left to check for roughness in the clutch lever and throttle operation is not smooth,
steering head bearings. replace the cable.
2. Stand in front of your CR, grab the fork (at Be sure the throttle returns freely from fully open
the axle), look at the steering head, and push to fully closed automatically, in all steering (2)
the fork in and out (toward the engine) to positions.
check for play in the steering head bearings.
If any roughness or play is felt, but you do (2) right crankcase cover
not see any movement in the steering head, Nuts, Bolts, Fasteners
the fork bushings may be worn. Refer to the (1)
Honda Service Manual for replacement or Check and tighten nuts, bolts, and fasteners (3)
adjustment procedures, or see your Honda before every outing. (5)
dealer.
Torque
Item Remarks
Handlebar Inspection lbf·ft N·m kgf·m
ENGINE
1. Check the handlebar (1) for bends or cracks. 1 Cylinder head 20 27 2.8
2. Check that the handlebar has not moved from 2 Right crankcase
(6)
its proper position (by inspecting the punch cover 6.6 9 0.9
mark alignment). 3 Carburetor insulator 6.6 9 0.9 (4)
3. Check the torque of the upper holder bolts (2) 4 Oil drain bolt 18 25 2.5 (1) cylinder head
5 Drive sprocket 10 13 1.3 (3) carburetor insulator
(Tighten the front bolts first). 6 Alternator cover 1.7 2.3 0.2
16 lbf·ft (22 N·m, 2.2 kgf·m) (4) oil drain bolt
(5) drive sprocket
(2) (6) alternator cover

(1)

(2)

(1) handlebar (2) upper holder bolts

68 Servicing Your Honda

 Appearance Care
Refer to Safety Precautions on page 19. • If you use a high pressure washer, avoid
spraying the following areas: Washing Your Motorcycle with a Mild
Frequent cleaning and polishing will keep your Detergent
Honda looking newer longer. Frequent cleaning wheel hubs
also identifies you as an owner who values your expansion chamber outlet 1. Rinse your CR thoroughly with cool water to
CR. A clean CR is also easier to inspect and under seat remove loose dirt.
service. engine stop button 2. Fill a bucket with cool water. Mix in a mild,
brake master cylinders neutral detergent, such as dish washing
While you’re cleaning, be sure to look for under fuel tank liquid or a product made especially for
damage, wear, and gasoline or oil leaks. drive chain washing motorcycles or automobiles.
carburetor 3. Wash your CR with a sponge or a
front fork dust seal soft towel. As you wash, check for heavy
General Recommendations steering head bearings grime. If necessary, use a mild
suspension pivot points cleaner/degreaser to remove the grime.
• To clean your CR you may use:
– water (2) (1) NOTICE
– a mild, neutral detergent and water
– a mild spray and wipe cleaner/polisher Do not use steel wool to clean the frame as it
– a mild spray and rinse cleaner/degreaser and could damage or discolor the frame surface.
water Muffler stain remover (Scotch Brite Hand Pad
• Avoid products that contain harsh detergents #7447 – maroon) is for removing stains on the
or chemical solvents that could damage the non-coated aluminum frame only.
metal, paint, and plastic on your CR or
discolor the seat and decals. 4. After washing, rinse your CR thoroughly with
• If your CR is still warm from recent (2) plenty of clean water to remove any residue.
operation, give the engine and exhaust system 5. Dry your CR with a chamois or a
time to cool off. (1) steering head bearings soft towel.
• We recommend the use of a garden hose to (2) suspension pivot points 6. Lubricate the drive chain to prevent rusting.
wash your CR. High pressure washers (like 7. Start the engine and let it idle for several
those at coin-operated car washes) can NOTICE minutes. The engine heat will help dry moist
damage certain parts of your CR. The force areas.
of water under extreme pressure can penetrate High pressure water (or air) can damage 8. As a precaution, ride at a slow speed and
the dust seals of the suspension pivot points certain parts of your CR. apply the brakes several times. This will help
and steering head bearings-driving dirt inside dry the brakes and restore normal braking
and needed lubrication out. You may use Pro Honda Hondabrite, a performance.
multi-surface cleaner/degreaser, to remove both
dirt and petroleum-based grime from paint, alloy,
plastic, and rubber surfaces. Wet any heavy
deposits with water first. Then spray on the
Hondabrite and rinse with a garden horse at full
pressure. Stubborn deposits may require a quick
wipe with a sponge.

Servicing Your Honda 69

Appearance Care
Condensation Control After Cleaning Lubrication

Changes in temperature combined with humidity There are some things you should do just after
allow moisture to form in some confined areas on washing your CR to help prevent rust and
your CR. The most affected area is the alternator/ corrosion.
ignition cavity in the left side of the crankcase.
Once your CR is clean and dry, you should
Each time you wash your CR you should remove protect any bare steel from rusting by applying a
the alternator cover (1), wipe out any visible light coating of a rust-inhibitor. Lubricate the
moisture, and allow the cavity to air dry for at drive chain and drive sprocket after removing and
least a couple of hours before installing the cover. thoroughly cleaning in solvent. Be sure the chain
Replace the gasket with a new one if it is not in is wiped clean and is dry before applying the
good condition before installing the cover. chain lube.

Some condensation can form within the Follow the suggestions given in the pages of this
transmission cavity as well. This is natural and manual for lubricating items such as the brake
just one more reason why you should change the and clutch lever pivot points and footpeg pivot
transmission oil often. pins.

(1)

(1) alternator cover

70 Servicing Your Honda

 Adjustments for Competition
This section tells you how to fine tune your CR Front Suspension Adjustments...........................72
for maximum competition performance. Rear Suspension Adjustments ............................80
Suspension Adjustment for Track Conditions....84
Initial suspension adjustments should be Suspension Adjustments Guidelines ..................85
performed after a minimum of two hours of easy Carburetor Adjustments & Tuning Tips .............88
break-in time. Chassis Adjustments...........................................95
Gearing ...............................................................96
Optional front and rear suspension springs are Tire Selection for Track Conditions...................97
available in both firmer and softer than standard Personal Fit Adjustments ...................................98
rates, in order to tailor your CR specifically for
your weight, riding style and course conditions.

Follow the instructions given in the rear

suspension sag setting section of Rear
Suspension Adjustments to determine if your
combined rider and sprung machine weight (rider
fully dressed for competition and machine
coolant, oil and fuel levels ready for competition)
requires an optional firmer or softer rear spring.
The need for either optional rear spring may need
to be balanced by installing the optional fork
springs of a similar rate.

Adjustments for Competition 71

Front Suspension Adjustments
Refer to Safety Precautions on page 19. The air pressure should be adjusted according to
the altitude and outside temperature. Front Suspension Oil Level
The front suspension can be adjusted for the
rider’s weight and riding conditions by using one 1. Place a workstand under the engine, so that • If your CR is brand-new, put enough part-
or more of the following methods: the front wheel is off the ground. throttle break-in time (about one hour) on it to
Do not adjust air pressure with the front wheel ensure that the suspension has worked in.
• Oil volume — The effects of higher or lower on the ground as this will give false pressure • For optimum performance, and extended fork
fork oil level are only felt during the final 3.9 readings. life, the fork should be completely
in (100 mm) of fork travel. 2. Remove the pressure release screw (1) of each disassembled and cleaned after the first 3
• Compression damping — Turning the front suspension. hours of riding. See the Service Manual or
compression damping screw adjusts how 3. Check that the O-ring (2) is in good condition. your Honda dealer for this service.
quickly the fork compresses. 4. Install and tighten the pressure release screw
• Rebound damping — Turning the rebound to the specified torque: 1. Place your CR on the optional workstand or
damping screw adjusts how quickly the fork 1.0 lbf·ft (1.3 N·m, 0.1 kgf·m) equivalent support with the front wheel off the
extends. ground.
• Fork springs — Optional springs are 2. Loosen the upper pinch bolts (1) (before
available in softer and stiffer types than the loosening the fork caps to avoid damaging the
standard rate. (page 116) fork caps).
3. Loosen the fork caps (2), but do not remove
them yet.
Front Suspension Air Pressure (1)
NOTICE
Air is an unstable gas which builds up pressure
as it is worked (such as in a fork). Air pressure (2) Using an adjustable wrench to loosen the fork
acts as a progressive spring and affects the entire caps may damage them.
range of fork travel. This means the fork action
on your CR will get stiffer during a race. For
this reason, release built-up air pressure in the (1) pressure release screw (2) O-ring (2)
fork legs between motos. Be sure the fork is
fully extended with the front tire off the ground
when you release the pressure.
(1)
The standard air pressure is 0 psi (0 kPa, 0
kgf/cm2). You may relieve accumulated air
pressure in the fork legs by using the pressure
release screws. The front wheel should be off the
ground before you release the pressure.

(1) upper pinch bolts (2) fork cap

72 Adjustments for Competition

 Front Suspension Adjustments
4. Remove the axle nut (3). 7. Loosen the fork leg lower pinch bolts (7), then 10.Hold the fork tube (10), then remove the fork
5. Pull the front axle shaft (4) out of the wheel pull the fork legs down and out. cap (2), from the fork tube. Gently slide the
hub and remove the front wheel. fork tube down onto the lower end of the
slider pipe (13).
(3) (2) (12)
(10)

(7)
(10)

(4) (13)

(7) lower pinch bolts (2) fork cap (12) adjuster screw
(3) axle nut (4) front axle shaft (10) fork tube (13) slider pipe, lower end
8. Clean the fork assembly, especially the sliding
6. Remove the fork protectors (5) and brake surface of the slider pipe (8) and dust seal (9). NOTICE
caliper (6).
Do not support the brake caliper by the brake When removing the fork cap, be careful not to
NOTICE
hose. damage the damping force adjuster needle rod
Do not operate the brake lever after the front The fork tube (10) can drop on the slider and (14) and the needle on the rod end.
wheel is removed. To do so will cause damage the fork dust seal and guide bushing (11)
difficulty in fitting the brake disc between the when the fork cap is removed. To avoid damage 11.Remove the fork cap (2) from the piston rod
brake pads. hold both the fork tube and slider when removing (15) by holding the lock nut (16).
the fork cap. 12.Remove the fork spring (17).
(9)
(2)
(5)
(16)
(14)

(17)
(8) (15)
(6) (11) (10)
(8) slider pipe (10) fork tube
(9) dust seal (11) guide bushing

(5) fork protectors (6) brake caliper 9. Record the rebound damping adjuster position
and turn the adjuster screw (12) (2) fork cap (16) lock nut
counterclockwise until it stops. (14) adjuster needle rod (17) fork spring
(15) piston rod
(cont’d)
Adjustments for Competition 73
Front Suspension Adjustments
13.Pour the recommended fork oil into the piston Fork Oil Level (CR85R) Optional Stiffer (0.30 kgf/mm) Fork Spring
rod (15) until a little oil flows out of the top
of the piston rod. Leave the piston rod for Standard (0.28 kgf/mm) Fork Spring  2-coils at one end; 
 1-coil at other end 
about 1 minute.
   
14.With the fork held upright, measure the oil  1-coil at both ends   
level (18) from the top of the fork tube to the  
fork oil.   Standard oil 3.9 in
level 99 mm
(15)
Standard oil 4.0 in
Maximum oil 3.7 in Slightly stiffer as
level 101 mm
level 93 mm it nears full
Maximum oil 3.7 in Slightly stiffer as compression.
level 95 mm it nears full
Minimum oil 4.1 in Slightly softer as
compression.
(18) level 104 mm it nears full
Minimum oil 4.2 in Slightly softer as compression.
level 106 mm it nears full
compression.

Optional Softer (0.26 kgf/mm) Fork Spring

 
 2-coils at both ends 
 
(15) piston rod (18) oil level  

Standard oil 3.9 in

15.Adjust the oil level by adding or removing oil level 99 mm
with an aftermarket syringe (19).
Maximum oil 3.7 in Slightly stiffer as
level 93 mm it nears full
compression.

Minimum oil 4.1 in Slightly softer as

level 104 mm it nears full
(19) compression.

(19) syringe

74 Adjustments for Competition

 Front Suspension Adjustments
Fork Oil Level (CR85RB) Optional Stiffer (0.30 kgf/mm) Fork Spring 16.Inspect both ends of the fork spring. If you
find any roughness or burred edge on the end
Standard (0.28 kgf/mm) Fork Spring   of either spring, smooth the roughness with a
 2-coils at one end; 
   1-coil at other end  file and some emery cloth.
 1-coil at both ends   
 
  Standard oil 4.1 in
level 105 mm
Standard oil 4.0 in
Maximum oil 4.0 in Slightly stiffer as
level 102 mm
level 102 mm it nears full
Maximum oil 3.7 in Slightly stiffer as compression.
level 95 mm it nears full
Minimum oil 4.3 in Slightly softer as
compression.
level 110 mm it nears full
Minimum oil 4.2 in Slightly softer as compression.
level 106 mm it nears full
compression. • Be sure the oil level is the same in both fork
legs.
Optional Softer (0.26 kgf/mm) Fork Spring • Always use the after market syringe while
  adjusting the oil level.
 2-coils at both ends  If it isn’t used, air may get into the fork.
  • If a syringe is not available, first set the oil
 
level somewhat lower than the normal level,
Standard oil 3.8 in then add small amounts of oil until the correct
level 96 mm level is obtained, measuring the level each
time oil is added.
Maximum oil 3.6 in Slightly stiffer as
level 92 mm it nears full
compression.

Minimum oil 3.9 in Slightly softer as

level 100 mm it nears full
compression.

(cont’d)

Adjustments for Competition 75

Front Suspension Adjustments
17.Clean the spring and spring seat thoroughly 22.Install the fork spring (17) as follows: 24.Install the fork cap assembly into piston rod.
with a high flash point solvent to remove all – With the fork spring held upright on its
metal particles and dirt. marked end, feed the mechanic’s wire up NOTICE
18.Dry the spring and spring seat with air through the spring.
pressure rather than a shop towel. Using a – Angle the fork spring and slowly slide it When installing the fork cap, be careful not to
shop towel allows lint to stick to the springs. down into the fork using a gentle rocking damage the damping force adjuster needle rod
Lint or any particles that stick in the damping motion. and the needle or the rod end.
passages can cause inconsistent damping. 23.Reaching through the two adjacent coils near
19.Check that the O-rings (20) on the fork cap the oil lock valve, hold the spring guide (22) 25.Screw the fork cap (2) on the piston rod.
and needle rod are in good condition. Apply with your finger. Hold the lock nut (16) and tighten it to the
the recommended fork oil to the O-rings. Remove the mechanic’s wire and hand tighten specified torque:
the lock nut (16). 15 lbf·ft (19.7 N·m, 2.0 kgf·m)
(20)
(16) (2)

(22) (2)

(17) (16)

(16)

(20) O-rings (16) lock nut (22) spring guide

(17) fork spring (2) fork cap (16) lock nut
20.Loosen the lock nut (16) slightly.
21.Attach a two-foot length of mechanic’s wire 26.Temporarily thread the fork cap into the fork
(21) to the threaded portion on the lock nut. tube.
Wrap the wire securely around the threads. 27.Insert both fork legs into the fork clamps.

(21)
(16)

(16) lock nut (21) mechanic's wire

76 Adjustments for Competition

 Front Suspension Adjustments
28.Align the groove (23) in the fork tube (10) 33.Clean the threads of the fork protector bolts 40.Align the brake caliper (6) and hose with the
with the top surface of the upper fork clamps and axle holder thoroughly. left fork leg, making sure that the brake hose
(24). 34.Apply locking agent to the bolt threads. is not twisted. An improperly routed brake
29.Temporarily tighten the fork lower pinch bolts 35.Install the fork protectors (5) and tighten the hose may rupture and cause a loss of braking
(7) and then tighten the fork cap (2) to the bolts to the specified torque: efficiency.
specified torque: 5.2 lbf·ft (7 N·m, 0.7 kgf·m) 41.Clean the threads of the caliper mounting
25 lbf·ft (34 N·m, 3.5 kgf·m) bolts (25) and brake caliper thoroughly.
30.For ease of releasing air pressure after the 42.Apply locking agent to the bolt threads.
forks are installed, loosen the lower pinch 43.Install the brake caliper on the fork slider and
bolts and position the fork outer tubes so that tighten the caliper bolts to the specified
the pressure release screws are in front of the (5)
torque:
rebound damping adjusters. 22 lbf·ft (30 N·m, 3.1 kgf·m)
31.Tighten the fork lower pinch bolts to the
specified torque: NOTICE
16 lbf·ft (22 N·m, 2.2 kgf·m)
32.Tighten the fork upper pinch bolts (1) to the Fit the brake caliper over the disc, taking care
specified torque: not to damage the brake pads.
16 lbf·ft (22 N·m, 2.2 kgf·m) (5) fork protectors

36.Clean the surfaces where the front axle shaft (25) (6)
NOTICE
and axle clamps contact each other.
Over-tightening the pinch bolts can deform the 37.Install the left and right side collars into the
fork tubes. Deformed fork tubes must be wheel hub.
replaced. 38.Insert the front axle shaft through the wheel
hub from the right side. Make sure the axle
shaft is seated firmly onto the left fork leg
(2) clamp inner surface.
(7)
(10) 39.Tighten the axle nut (3) to the specified
torque:
46 lbf·ft (62 N·m, 6.3 kgf·m)
(6) brake caliper (25) caliper mounting bolts

(3)
(23)

(1) (24)

(1) upper pinch bolts (10) fork tube

(2) fork cap (23) groove
(7) lower pinch bolts (24) upper fork clamp
(3) axle nut
(cont’d)

Adjustments for Competition 77

Front Suspension Adjustments
44.With the front brake applied, pump the fork Rebound Damping
up and down several times to seat the axle and Front Suspension Damping Rebound damping effects how quickly the fork
check front brake operation. rebounds.
Compression Damping
Compression damping affects how quickly the The rebound damping adjuster has 3 turns or
fork compresses. less.

The compression damping adjuster has 15 Always start with the full hard position when
positions or more. Turning the adjuster screw adjusting damping.
one full turn advances the adjuster 4 positions.
To adjust to the standard position:
Always start with the full hard position when
adjusting damping.

To adjust to the standard position:

(1) (2)

45.Turn the rebound damping adjuster screws

back to their original settings.

(2) rebound damping adjuster

1. Turn the rebound damping adjuster (2)

(1) compression damping adjuster clockwise until it will no longer turn (lightly
seats). This is the full hard position.
1. Turn the compression damping adjuster (1) 2. Turn the adjuster counterclockwise 3/4
clockwise until it will no longer turn (lightly (CR85R), 1-1/4 (CR85RB) turns. This is the
seats). This is the full hard position. standard position.
2. Turn the adjuster counterclockwise 9 3. Make sure both fork legs are adjusted to the
(CR85R), 10 (CR85RB) clicks. same position.
This is the standard position.
3. Make sure that both fork legs are adjusted to
the same position.

78 Adjustments for Competition

 Front Suspension Adjustments
When adjusting oil levels, bear in mind that the
Fork Springs air in the fork will increase in pressure while
riding; therefore, the higher the oil level, the
The fork springs in CR’s are about right for higher the eventual pressure of any air in the
riders weighting between 150 and 160 lbs (less fork.
riding gear). So if you’re a heavier rider, you Fork Travel Characteristics
have to go up on the oil level or get a stiffer CR85R
spring. Do not use less oil than the minimum
specified for each spring or there will be a loss of
rebound damping control near full extension.
If the fork is too hard on big bumps, turn the Oil level: 3.7 in (95 mm)
damping adjuster counterclockwise one-click and (MAX)
lower the oil level in increments of 0.2 in (5 mm)
in both fork legs until the desired performance is Oil level: 4.0 in (101 mm)
(STD)
obtained. Do not, however, lower the oil level
below the minimum oil level.

Force:kgf
Oil level:
Minimum oil level: (CR85R) 4.2 in (106 mm)
(MIN)
Standard Spring: 4.2 in (106 mm)
Softer Spring: 4.1 in (104 mm)
Stiffer Spring: 4.1 in (104 mm) 0 3.9 7.9 11.8
(100) (200) (300)
Minimum oil level: (CR85RB)
Stroke : in (mm)
Standard Spring: 4.2 in (106 mm)
Softer Spring: 3.9 in (100 mm) CR85RB
Stiffer Spring: 4.3 in (110 mm)

Oil level: 3.7 in (95 mm)

(MAX)

Oil level: 4.0 in (102 mm)

(STD)
Force:kgf

Oil level:
4.2 in (106 mm)
(MIN)

0 3.9 7.9 11.8

(100) (200) (300)

Stroke : in (mm)

Adjustments for Competition 79

Rear Suspension Adjustments
Refer to Safety Precautions on page 19. 3. Check that the spring pre-load is adjusted to Pin spanners should be used for turning the lock
the standard length. Adjust as necessary by nut and adjusting nut. See page 116 for optional
The rear suspension can be adjusted for the loosening the lock nut (1) and turning the pin spanners.
rider’s weight and riding conditions by changing adjusting nut (2).
the spring pre-load and the rebound and Each complete turn of the adjuster nut (CR85R)
compression damping. changes the spring length by 1/16 in (1.5 Spring pre-load length (Standard spring)
mm). Standard: 9.3 in (237 mm)
The rear shock absorber assembly includes a Min. : 8.7 in (221 mm)
damper unit that contains high pressure nitrogen
gas. Do not attempt to disassemble, service, or (1) Spring pre-load length (Optional spring)
dispose of the damper; see your Honda dealer. Min. (Softer, 4.6 kgf/mm): 8.6 in (218 mm)
The instructions found in this owner’s manual are (4) Min. (Softer, 4.8 kgf/mm): 8.7 in (222 mm)
limited to adjustments of the shock assembly Min. (Stiffer, 5.2 kgf/mm): 8.9 in (225 mm)
only. Min. (Stiffer, 5.4 kgf/mm): 8.7 in (220 mm)

Puncture or exposure to flame may also result in (CR85RB)

an explosion, causing serious injury. (2) Spring pre-load length (Standard spring)
Service or disposal should only be done by your (3) Standard: 9.0 in (229 mm)
authorized Honda dealer or a qualified mechanic, Min. : 8.9 in (225 mm)
equipped with the proper tools, safety equipment
and the official Honda Service Manual. (1) lock nut (3) pin spanners Spring pre-load length (Optional spring)
(2) adjuster nut (4) spring length Min. (Softer, 4.8 kgf/mm): 8.7 in (222 mm)
If your CR is new, put enough part-throttle Min. (Softer, 5.0 kgf/mm): 8.7 in (221 mm)
break-in time (about one hour) on it to ensure To increase spring pre-load: Min. (Stiffer, 5.4 kgf/mm): 8.7 in (220 mm)
that the suspension has worked in. Loosen the lock nut with the optional pin spanner Min. (Stiffer, 5.6 kgf/mm): 8.9 in (225 mm)
(3) and turn the adjusting nut to shorten the
spring length (4). Do not shorten to less than:
Rear Suspension Spring Pre-Load 8.7 in (221 mm)................CR85R
8.9 in (225 mm)................CR85RB
An optional pin spanner is available for turning
the lock nut and adjusting nut to adjust spring To decrease spring pre-load:
pre-load. Loosen the lock nut with the optional pin spanner
(3) and turn the adjusting nut to increase the
1. Place a workstand under the engine to raise spring length (4). Do not increase to more than:
the rear wheel off the ground. 9.4 in (238 mm)
2. Remove the subframe. See page 32.
Each turn of the adjuster changes spring length
and spring pre-load. One turn equals: spring
length/spring pre-load:
1/16 in (1.5 mm)

80 Adjustments for Competition

 Rear Suspension Adjustments
Rebound Damping
Rear Suspension Damping The rebound damping adjuster (4) is located at
the lower end of the shock absorber.
Compression Damping
Compression damping can be adjusted with the To increase damping, turn the adjuster screw
adjuster located on the rear shock absorber's clockwise.
reservoir.
To decrease damping, turn the adjuster screw
To increase damping, turn the adjuster screw counterclockwise.
clockwise.

To decrease damping, turn the screw

counterclockwise. (4)
(2) (3)

(1)
(5)
(6)

(4) rebound damping adjuster (6) reference mark

(5) punch mark

(1) adjuster (3) reference mark To adjust to the standard position:

(2) punch mark 1. Turn the adjuster clockwise until it will no
longer turn (lightly seats). This is the full hard
To adjust to the standard position: position.
1. Turn the adjuster (1) clockwise until it will no 2. Turn the adjuster counterclockwise
longer turn (lightly seats). This is the full hard approximately 1-1/4 (CR85R), 1/2 (CR85RB)
position. turns so that the punch mark (5) on the
2. Turn the adjuster counterclockwise adjuster aligns with the reference mark (6) on
approximately 1-3/4 (CR85R), 3/4 (CR85RB) the shock absorber.
turns so that the punch mark (2) on the
adjuster aligns with the reference mark (3) on
the shock absorber.

Adjustments for Competition 81

Rear Suspension Adjustments
LAST CHAIN ADJUSTER 4. Calculate the race sag dimension.
Rear Suspension Race Sag MARK To do this, subtract the loaded with rider
SEAT MOUNTING
BOLT dimension (step 3) from the unloaded
Setting the proper race sag (ride height) is very dimension (step 2).
important for competition use.
Standard Race Sag: 3.3 in (85 mm)
Race sag refers to the amount of rear wheel travel
used by your CR at rest, ready to ride, with you UNLOADED Adjust spring pre-load as necessary to obtain
MEASUREMENT
on the seat. As a general rule of thumb, the race (without rider)
the desired handling results.
sag dimension should be about one-third of the Example: 23.4 in Decreasing the race sag dimension (example:
maximum travel. (595 mm) 3.5 in, 90 mm) improves turning ability for
tight terrain at the cost of slightly reduced
On your CR, ride height is changed by adjusting straight line stability.
the rear suspension spring pre-load. 3. Measure the loaded with rider dimension. Increasing the race sag dimension (example:
Remove the workstand. With two helpers 3.9 in, 100 mm) may improve stability on
Spring Pre-load & Race Sag Adjustment available, sit as far forward as possible on faster terrain with less turns, but will reduce
The following adjustment procedure establishes your CR’s seat, wearing your riding apparel. turning performance slightly and may upset
the correct starting point for any suspension Ask one helper to steady your CR perfectly the balance between the front and rear
tuning — the proper rear spring pre-load upright so you can put both feet on the pegs. suspension, producing a harsher ride. This
adjustment for your specific needs. Bounce your weight on the seat a couple of will happen if the adjustment shifts the
Your CR should be at normal racing weight, times to help the suspension overcome any effective wheel travel toward the more
including fuel and transmission oil. You should situation and settle to a good reference point. progressive end of its range.
be wearing all your normal protective apparel. 5. Measure the loaded without rider dimension.
You will need two helpers. Ask the other helper to measure the loaded Do this with your CR set at the standard race
with rider dimension. sag.
To calculate the proper adjustment, it is necessary
to measure between two fixed points — from the
center of the seat mounting bolt to the edge of
the last chain adjuster mark, as illustrated — for
three different situations:
LOADED BIKE LOADED
unloaded: motorcycle on workstand with rear (with rider) (without rider)
suspension fully extended, no rider. Example: 20.1 in Example: 22.8 in
loaded with rider: motorcycle on ground, with (510 mm) (580 mm)
rider.
loaded without rider: motorcycle on ground, Race Sag Calculation: Free Sag Calculation:
without rider unloaded 23.4 in (595 mm) unloaded 23.4 in (595 mm)
—loaded with rider 20.1 in (510 mm) —loaded W/O rider 22.8 in (580 mm)
1. Support your CR on a workstand with the rear Race Sag 3.3 in (85 mm) Free Sag 0.6 in (15 mm)
wheel off the ground.
2. Measure the unloaded dimension.

82 Adjustments for Competition

 Rear Suspension Adjustments
6. Calculate the free sag dimension. Because of the great absorption quality of the
To do this, subtract the loaded without rider shock bumper rubber, it may be difficult for you
dimension (step 5) from the unloaded to notice when your CR’s suspension is
dimension (step 2). bottoming. Some riders may think the damping
Free sag indicates the distance your rear or perhaps the leverage ratio is too harsh. In
suspension should sag from the weight of the reality, the problem is most likely insufficient
sprung portion of your CR. spring pre-load or a spring that is too soft. Either
With the spring pre-load set to obtain the situation prevents utilizing the full travel.
proper race sag, the rear suspension should
sag 0.4 to 1.0 in (10 to 25 mm). Keep in mind that a properly adjusted suspension
If the rear of your CR sags more than 1.0 in system may bottom slightly every few minutes at
(25 mm) from its own weight, the spring is full speed. Adjusting the suspension to avoid this
too stiff for your weight. It is not compressed occasional bottoming may cost more in overall
enough, even though you have the proper race suspension performance than it is worth.
sag adjustment. As a result, the rear
suspension will not extend as far as it should. A spring that is too firm for your weight will not
allow the rear tire to hook up under acceleration
Spring Rates and will pass more bumps on to you.
If you are lighter or heavier than the average
rider and cannot set the proper ride height
without altering the correct spring pre-load,
consider an aftermarket shock absorber spring.

A spring that is too soft for your weight forces

you to add excessive spring pre-load to get the
right race sag and, as a result, the rear end of the
motorcycle is raised. This can cause the rear
wheel to unload too much in the air and top out
as travel rebounds. The rear end may top out
from light braking, or kick sideways over lips
and square-edged terrain. It may even top-out
when you dismount your CR.

Adjustments for Competition 83

Suspension Adjustments for Track Conditions
Soft Surface
On soft ground, sand, and especially mud,
consider increasing compression damping front
and rear.

Sand often requires a bit more rebound damping

to minimize rear end kick. Although sand bumps
are usually larger, there’s more distance between
them, giving the shock more time to recover.

You may want a little bit stiffer front suspension

for sand tracks to help keep the front end up and
improve straight-line stability.

In a muddy event, stiffer aftermarket springs

front and rear may help, especially if you are
heavier than the average rider. Your CR may be
undersprung because of the added weight of the
clinging mud. This additional weight may
compress the suspension too much and affect
traction.

Hard Surface
On harder ground, run less compression
damping.

For a fast, hard track with no large jumps, you

can probably run the same spring as normal, but
run softer damping both ways-compression and
rebound. If you run softer rebound damping, the
wheel will follow the rough ground and small
bumps much better, and you will hook up better.
With a lot of rebound damping, the wheel returns
very slowly and doesn’t contact the ground
quickly enough after each bump. The result is a
loss of traction and slower lap times.

84 Adjustments for Competition

 Suspension Adjustment Guidelines
Follow the procedures described below to accurately adjust your CR, using the methods described on pages 72 - 84. Remember to make all adjustments in
one-click increments. Test ride after each adjustment.

Front Suspension Adjustment

Adjustments for Type of Track

Hard-surfaced track Begin with the standard setting. If the suspension is too stiff/soft, adjust according to the chart below.

Sand track Adjust to a stiffer position.

Example: – Turn the compression damping adjuster to a stiffer position.
– Install the optional stiff spring. (Adjust compression damping to a softer position and rebound damping to a harder position at
this time.)

Mud track Adjust to a stiffer position because mud build-up increases your CR’s weight.
Example: – Turn the compression damping adjuster to a stiffer setting.
– Install the optional stiff spring.

Adjustments for Too Soft/Stiff Damping

Symptom Action
Soft Initial travel too soft: – Test stiffer compression damping adjustments in one-click increments.
suspension • Steering is too quick. – Test stiffer rebound damping in 1/4 turn increments.
• Front end darts while cornering or riding in a straight line.

Middle travel too soft: If suspension isn’t stiff in initial travel:

• Front end dives when cornering. – Test stiffer compression damping adjustments in one-click increments.
If initial travel becomes stiff because of the above adjustment:
– Reduce the rebound damping in 1/4 turn increments.
– Test softer compression damping adjustments in one-click increments.
If that doesn’t solve the problem, install the optional stiff spring.

Final travel too soft: If initial and middle travel aren’t stiff:
• Bottoms on landings. – Test stiffer compression damping adjustments in one-click increments.
• Bottoms on large bumps, especially downhill bumps. If initial and middle travel are stiff:
– Install the optional stiff spring.
If initial travel is stiff after installing the optional stiff spring:
– Test soft compression damping adjustments in one-click increments.
If initial travel is still soft after installing the optional stiff spring:
– Test stiffer compression damping adjustments in one-click increments.
If final travel is still soft after installing the optional stiff spring:
– Increase the fork oil level in increments of 0.2 in (5 mm).

Entire travel too soft: – Install the optional stiff spring.

• Front end shakes. – Test stiffer compression damping adjustments in one-click increments.
• Fork bottoms over any type of terrain. – Increase rebound damping in 1/4 turn increments.

Adjustments for Competition 85

Suspension Adjustment Guidelines

Symptom Action
Stiff Initial travel too stiff: – Test softer compression damping adjustments in one-click increments.
suspension • Stiff on small bumps while riding at full throttle in a straight line. – Reduce the rebound damping adjustments in 1/4 turn increments.
• Stiff on small cornering bumps. – Check for dirt in the dust seals. Check the fork oil for any contamination.
• Front end wanders while riding at full throttle in a straight line. If the front end dives while cornering, reduce the rebound damping in 1/4 turn
increments. If that doesn’t solve the problem, install the optional stiff spring.
If the stiff spring makes the suspension too stiff over the full range of travel:
test softer compression damping adjustments in one-click increments until the
desire compression damping for initial travel is obtained.

Middle travel too stiff: If initial travel isn’t stiff:

• Stiff on bumps when cornering. – Test stiffer compression damping adjustments in one-click increments. (This
• Front end wanders when cornering. should produce smooth fork action from initial to middle travel.)
• Stiff suspension on bumps, especially downhill bumps. If initial and middle travel is stiff:
• While braking, front end dives during initial travel, then feels stiff. – Test softer compression damping adjustments in one-click increments.
– Reduce the rebound damping in 1/4 turn increments.

Final travel too stiff: If initial and middle travel aren’t stiff:
• Doesn’t bottom on landings, but feels stiff. – Test stiffer compression damping adjustments in one-click increments. (This
• Stiff on large bumps, especially downhill bumps. should produce smooth fork action from initial to middle travel.)
• Stiff on large bumps when cornering. If final travel is still stiff after the above adjustment, or
If initial and middle travel becomes stiff:
– Install the optional soft spring.
– Test softer compression damping adjustments in one-click increments.
If the entire travel feels stiff after the above adjustment:
– Test softer compression damping adjustments in one-click increments until the
desired initial travel compression damping is obtained.
– Lower the oil level by 0.2 in (5 mm).

Entire travel too stiff: – Test softer compression damping adjustments in one-click increments.
• Stiff suspension on any type of terrain. – Reduce the rebound damping in 1/4 turn increments.
– Lower the oil level by 0.2 in (5 mm).

86 Adjustments for Competition

 Suspension Adjustment Guidelines
Rear Suspension Adjustment
Adjustments for Type of Track

Hard-surfaced track Begin with the standard settings. If the suspension is too stiff/soft, adjust according to the chart below.

Sand track Lower the rear end (to improve front wheel stability) by increasing Race Sag (reduce spring preload).
Example: – Turn the compression damping adjuster and, especially, rebound damping adjuster to a stiffer setting.
– Increase standard Race Sag (+0.2 to 0.4 in/5 to 10 mm).

Mud track Adjust to a stiffer position because mud build-up increases your CR’s weight.
Example: – Adjust the compression and rebound damping adjusters to stiffer settings.
– Install the optional stiff spring.
– Reduce standard Race Sag (–0.2 to 0.4 in/5 to 10 mm).

Adjustments for Too Soft/Stiff Suspension

Symptom Action

Stiff Entire travel too stiff – Test softer compression and rebound damping adjustments in one-click increments.
suspension – Install the optional soft spring.

Soft Suspension bottoms or rear end shakes: – Test stiffer comression and rebound damping adjustments in one-click increments.
suspension – Install the optional stiff spring.

Adjustments for Too Soft/Stiff Suspension

Symptom Action

Rear end kicks up on deep bumps on sand track. – Test stiffer compression and rebound damping adjustments in 1/4 turn increments until the rear end does not
kick up and/or the suspension becomes stiff.
– Then test softer compression damping adjustments in 1/4 turn increments.

Suspension bottoms and rear end kicks up on large bumps – Test stiffer compression and rebound damping adjustments in 1/4 turn increments.
on a hard-surface track.

Rear end gets poor traction accelerating away from a – Test softer rebound damping adjustments in 1/4 turn increments. (Test no more than 2-1/2 turns.)
corner. – If 1/2 or 3/4 turns don't produce satisfactory results, test softer compression damping adjustments in 1/4 turn
increments.
– After the above adjustment, check if the suspension bottoms after jumping. If it does, test stiffer compression
damping adjustments in 1/4 turn increments.

Rear end kicks sideways and suspension feels stiff on – Test softer rebound damping adjustments in 1/4 turn increments.
continuous bumps. – After the above adjustment, check if the suspension bottoms after jumping. If it does, test stiffer compressi
on damping adjustments in 1/4 turn increments.

Adjustments for Competition 87

Carburetor Adjustments & Tuning Tips
Refer to Safety Precautions on page 19. Slow Circuit
Fuel is metered by the slow jet (5) and is mixed
The carburetor on your CR should with air that has been metered by the air screw
perform suitably with the standard recommended (6). The mixture enters the venturi through the (10)
(12)
settings under average load, climatic, and bypass (7) and slow jet circuit outlet (8). (13)
barometric conditions. However, to fine tune the
(11)
engine’s power output, the carburetor may (16) (15)
require adjustments for specific competition
needs. (9) (14)
(8)
(7)
Optional main jets and slow jets are available for (9) main jet (14) float
your motorcycle. See your Honda dealer. (10) jet needle (15) float valve
(11) needle jet (16) float bowl
(12) air jet
Any engine or airbox modifications or the use of (13) nozzle
an aftermarket exhaust system may require
jetting changes. Carburetor Circuit Functions
(5) (6)
The carburetor has several major circuits, each
Carburetor Components providing the fuel/air mixture over a given range
of throttle valve opening.
Starting Circuit (5) slow jet (7) bypass
A very rich mixture must be delivered to the (6) air screw (8) slow jet circuit outlet
These major circuits overlap as shown below.
cylinder when the engine is being started. When
the choke knob (1) is pulled up, fuel is metered Main Circuit
by the starter jet (2) and is mixed with air from Fuel is metered by the main jet (9), jet needle
the air passage (3) to provide a rich mixture for (10) and needle jet (11). It is then mixed with air
starting. The mixture discharges through the coming from the air jet (12) and enters the
orifice (4) into the cylinder. venturi at the nozzle (13).

(1) Float Chamber

(4) (3) The float (14) and float valve (15) operate to
Main Jet
maintain a constant level of fuel in the float bowl
The main jet affects air/fuel ratio from half to full
(16) .
throttle. The size should be reduced at higher
altitudes.
(2)
Honda carburetor jet sizes are numbered in
increments of 2or3. When changing the main jet
size, increase or decrease it gradually until the
desired setting is obtained. Because your CR’s jet
size numbers do not correspond with other
carburetor manufacturer’s jet size numbers, use
(1) choke knob (3) air passage only Honda jets.
(2) starter jet (4) orifice

88 Adjustments for Competition

 Carburetor Adjustments & Tuning Tips
Jet Needle All jetting is based on
The jet needle controls fuel/air mixture over 1/16 • Standard Jetting
to 3/4 throttle. The straight section (1) affects • 32:1 Fuel/Oil Ratio
throttle response at smaller throttle openings. By • Unmodified Engine (Including Porting, Exhaust and Timing)
changing the position of the clip (2) in its groove,
you can improve acceleration at medium low and TEMPERATURE FAHR. –21 ~ 0° –1 ~ 20° 19 ~ 40° 39 ~ 60° 59 ~ 80° 79 ~ 100° 99 ~ 120°
medium speed.
ALTITUDE Cent –30 ~ –17° –18 ~ –6° –7 ~ 5° 4 ~16° 15 ~ 27° 26 ~ 38° 37 ~ 49°
1st
LEANER 2nd (2) 10,000 ft AS: 2 2 2 1/4 2 1/2 2 3/4 3 3
3rd (3,050m) SJ: 45 45 45 45 45 45 42
4th to NC: 3rd 3rd 2nd 2nd 2nd 2nd 1st
5th (1) 7,500 ft JN: NBKF NFSF NBKF NBKG NFSG NFSG NBKG
(2,300m) MJ: 142 142 140 138 135 132 130
RICHER
7,499 ft AS: 1 3/4 2 2 2 1/4 2 1/2 2 3/4 3
(2,299m) SJ: 45 45 45 45 45 45 45
to NC: 3rd 3rd 3rd 2nd 2nd 2nd 2nd
5,000 ft JN: NBKF NBKF NFSF NBKF NBKG NFSG NFSG
(1,500m) MJ: 145 142 142 140 138 135 132
(1) straight section (2) clip 4,999 ft AS: 2 1 3/4 2 2 2 1/4 2 1/2 2 3/4
(1,499m) SJ: 48 45 45 45 45 45 45
Slow Jet and Air Screw to NC: 3rd 3rd 3rd 3rd 2nd 2nd 2nd
2,500 ft JN: NBKE NBKF NBKF NFSF NBKF NBKG NFSG
Refer to Carburetor Minor Adjustments (Page MJ: 148 145 142 142 140 138 135
(750m)
91).
2,499 ft AS: 1 3/4 2 1 3/4 2 2 2 1/4 2 1/2

STANDARD

SETTING
(749m) SJ: 48 48 45 45 45 45 45
Standard Tuning Recommendations to NC: 4th 3rd 3rd 3rd 3rd 2nd 2nd
1,000 ft JN: NFSE NBKE NBKF NBKF NFSF NBKF NBKG
(300m) MJ: 150 148 145 142 142 140 138
For the following recommendations to be
accurate, you must use the standard settings as a 999 ft AS: 1 1/2 1 3/4 2 1 3/4 2 2 2 1/4
(299m) SJ: 48 48 48 45 45 45 45
baseline. Also, don’t change any of the settings NC: 4th 4th 3rd 3rd 3rd 3rd 2nd
to
until you’ve determined what changes are Sea Level JN: NBKE NFSE NBKE NBKF NBKF NFSF NBKF
necessary. (0m) MJ: 152 150 148 145 142 142 140

Adjustment Standard settings

Legend
Air screw opening 2 turns out
AS: Air Screw opening from fully seated
Slow jet #45 SJ: Slow Jet
Jet needle NFSF NC: Needle Clip position
JN: Jet Needle
Needle clip position 3rd groove from top MJ: Main Jet
Main jet #142
Float level 0.75 in (19.0 mm)
Identification number PWK10A

Adjustments for Competition 89

Carburetor Adjustments & Tuning Tips
Once you’ve adjusted the carburetor for
Adjustments for Altitude & Temperature temperature and altitude, it shouldn’t need major Pre-Adjustment Checks
readjustment unless race conditions change
All jetting recommendations are based on drastically. However, there are some unique Before adjusting carburetor settings, check the
standard jetting with an unmodified engine. The atmospheric conditions or race day situations that following:
following conditions can affect the fuel mixture. may require additional adjustments. They are as • air cleaner condition (page 40)
follows. • air leaks
Condition Mixture will be: Adjust to: • ignition timing
cold temperature lean richer To prevent engine damage, always adjust the • float level (page 93)
main jet before adjusting the jet needle. Always • clogged carburetor jets
warm temperature rich leaner choose the next richer jet if there is any doubt so • spark plug fouling (improper heat range or
dry air lean richer there is a margin for safety. other cause)
• freshness of fuel and fuel/oil ratio
high humidity rich leaner Main Jet • Go richer on the main jet, by one
high altitude rich leaner number, when: the track has a very If the above check out, then, adjust the carburetor
long straightaway or uphill section, for your specific racing conditions. Engine
a high percentage of sand, or the response and appearance of the firing end of a
track is muddy. spark plug are highly indicative of the engine
Special Tuning Conditions • Go leaner on the main jet, by one condition.
number, when: it is very humid or
There are some unique atmospheric conditions or raining, or it is hotter than 113°F Refer to the list on page 115 for the optional
situations that may require additional (45 °C). carburetor parts.
adjustments.
After using the chart, and making any To prevent engine damage, always adjust the
It should not be necessary to go more than one adjustments for special conditions, it shouldn’t be main jet before adjusting the jet needle. If there
jet size richer or leaner to fine tune your CR. If necessary to go more than one jet size richer or is any doubt — always choose the next richer jet
larger jetting changes are necessary, check for air leaner to fine tune your CR. If larger jetting so there is a margin for safety.
leaks, blocked or restricted exhaust or fuel changes are necessary, check for worn crankshaft
systems, or a dirty air cleaner. seals, air leaks, blocked or restricted exhaust or
fuel systems, or a dirty air cleaner.
Condition Main Jet Adjustment

long straights next larger

uphill sections

sand

mud

high humidity next smaller

raining

hotter than 113 °F (45 °C)

90 Adjustments for Competition

 Carburetor Adjustments & Tuning Tips
Carburetor Minor Adjustments WARNING
Gasoline is highly flammable and
• The standard carburetor settings are ideal for explosive. You can be burned or
the following conditions: 32-to-1 premix ratio seriously injured when handling fuel.
using Pro Honda HP2 2-stroke Oil or its (+) (1)
equivalent, sea level altitude, and 68 °F (20 (2) • Stop the engine and keep heat, sparks
°C) air temperature. If your conditions are and flame away.
different, you may need to adjust the (–) • Handle fuel only outdoors.
carburetor settings, using the tuning • Wipe up spills immediately.
information on pages 88-90. Confirm your
settings are correct before proceeding.
(1) throttle stop screw (+) increase 4. If you’ve determined that the main and slow
Minor Adjustments (2) air screw (–) decrease jets must be changed, you must remove the
1. Adjust the carburetor setting using the tuning float bowl plug.
information on pages 88-90. The minimum to maximum range of air screw Removing the float bowl plug will allow the
2. When the engine is warm enough to run adjustments is 11/2 to 3 turns out from the lightly fuel in the float bowl to drain. Do not remove
without the choke, push the choke knob down seated position. If you exceed 3 turns out, the the plug if the engine is hot.
to its off position. next smallest slow jet is needed. If you are under 5. Turn the fuel valve OFF, and disconnect the
3. Turn the throttle stop screw (1) to obtain the 11/2 turn out, the next larger slow jet is needed. fuel line from the fuel valve.
smoothest idle: 6. Loosen the connecting and insulator tube
– To decrease idle speed, turn the screw Adjustment Procedure clamp screws (1). Rotate the carburetor.
counterclockwise. 1. Warm up the engine. Remove the float bowl plug (2).
– To increase idle speed, turn the screw 2. Make two or three laps of a course with the
clockwise. standard setting or corrected jetting (page 89)
4. Adjust the air screw (2) to obtain the best off- and spark plug. Note engine acceleration and
idle performance. other engine conditions in relation to throttle
– If the engine blubbers (rich) exiting a opening. Verify carburetion by removing the
corner, turn the air screw spark plug and reading its firing end (pages
counterclockwise to lean the mixture. 46, 94). It may take more than two or three
laps to get a good spark plug reading with a (1)
– If the engine surges (lean) exiting a corner, (1)
turn the air screw clockwise to richen the new spark plug.
mixture. 3. Change carburetor settings or select suitable
carburetor jets, taking into consideration the
engine conditions and factors for temperature (2)
and altitude (page 89).

(1) connecting and insulator tube clamp screws

(2) float bowl plug

(cont’d)

Adjustments for Competition 91

Carburetor Adjustments & Tuning Tips
7. Change the jets as required. 4. Remove the carburetor to the left side.
Carburetor Disassembly/Assembly Be careful not to damage around the throttle
sensor.
1. Turn the fuel valve off. Do not assemble or move the carburetor while
2. Disconnect the fuel line (1) from the holding the throttle sensor lead.
carburetor. 5. Remove the screws (3) and carburetor top (4),
then pull out the throttle valve.
WARNING
Gasoline is highly flammable and
explosive. You can be burned or
(3)
seriously injured when handling fuel.
(4) (3)
• Stop the engine and keep heat, sparks (4)
(3) main jet (4) slow jet and flame away.
• Handle fuel only outdoors.
8. Reinstall the float bowl and its plug securely. • Wipe up spills immediately.
9. Remove the carburetor top, throttle valve and
throttle cable (page 93), and then change the
jet needle clip position as required. 3. Loosen the insulator and connecting tube
10.Reinstall the jet needle, throttle valve, cable clamp screws (2). (3) screws
holder and carburetor top (page 93). (4) carburetor top
11.Turn the carburetor upright and tighten its
clamp screws.
12.Adjust the air screw opening required.
Reconnect the fuel line at the carburetor.
13.Repeat steps 2 through 11 until the engine
gives maximum power with the correct spark
plug reading. It is always better to jet a little
rich than a little lean. It is advisable to record
(1)
the settings, course conditions, lap times, and
climatic and barometric conditions for future (2)
reference.

(1) fuel line

(2) insulator and connecting tube clamp screws

92 Adjustments for Competition

 Carburetor Adjustments & Tuning Tips
6. Remove the throttle cable (5) and cable holder 9. Remove the float bowl screws (11) and float 11.To assemble, reverse the disassembly
(6) from the throttle valve (7). bowl (12). procedures.
7. Remove the cable holder and throttle valve 12.To install the carburetor, reverse the removal
spring (8) from the throttle cable. procedures.
8. Remove the throttle cable holder and jet (12)
needle (9) from the throttle valve. After installing the carburetor, check the air vent
(11) hoses (16) and overflow hose (17) for kinking or
(11) pinching and correct routing as necessary.
(16)
(8)
(5)
(16)
(7)

(11) float bowl screws (12) float bowl

10.Use a float level gauge (13) to measure the (17)

float level (14) with the float tab just
contacting the float valve and the carburetor
intake (15) facing up. The float level should (16) air vent hoses (17) overflow hose
be 0.75 in (19.0 mm). Adjust the float level by
(8)
bending the float tab carefully.

(6) (5)
(15)

(7) (14)

(9) (13)

(5) throttle cable (8) throttle valve spring

(6) cable holder (9) jet needle
(7) throttle valve

(13) float level gauge (15) carburetor intake

(14) float level

Adjustments for Competition 93

Carburetor Adjustments & Tuning Tips
To obtain an accurate reading of a new spark Spark Plug Coloring Guidelines
Spark Plug Reading plug:
1. Accelerate at full throttle on a straight Condition Spark Plug Appearance Mixture
Refer to Spark Plug on page 46. 2. Push the engine stop button and pull the
Normal Dark brown to light tan correct
clutch lever in to release the clutch. color with dry electrode
Check any jetting change by reading the spark 3. Coast to a stop.
plug. The following procedure is recommended. 4. Remove the spark plug. Overheating Light gray or white color lean
You may not get an accurate reading if you 5. Use a magnifying glass to inspect the spark (Lean)
simply turn off the engine and pull the plug for plug. The porcelain insulator (1) around the Wet Wet or sooty rich
inspection. center electrode (2) should appear clean and (Rich)
colorless with a gray ring around the center
Use a new spark plug. Inspect the plug before electrode where it exits the porcelain. Remember that in addition to improper jetting:
installing it. Metallic specks indicate lean jetting that is • A lean condition can be caused by air leaks in
removing metal from the piston. Black sooty the insulator tract, in the center crankcase
NOTICE streaks on the porcelain indicate rich jetting. joint and leaking ignition side crank seal.
Insufficient oil on the air cleaner may also
Using spark plugs with an improper heat range NOTICE cause a lean condition.
or incorrect reach can cause engine damage. • A rich condition may be caused by a leaking
Improperly tightened spark plugs can damage the primary drive side seal — that draws
Before removing the spark plug, clean the spark engine. If a plug is too loose, a piston may be transmission oil into the fuel/air mixture.
plug area thoroughly to prevent dirt from entering damaged. If a plug is too tight, the threads may Excessive smoking will occur. Failure to
the cylinder. be damaged. remove the air cleaner housing cover for dry
conditions may also cause a rich condition.
Ride for 10 - 15 minutes before taking a plug
reading. A new plug will not color immediately. Pressure/vacuum testing your engine on a
(2) regular basis to detect air leaks is
recommended. See your Honda dealer.

The same simple throttle opening

(1)
identification system used in the
(3) Break-in section of this manual can also be
used to accurately identify where carburetion
(1) insulator (3) side electrode problems occur, should they arise (page 16).
(2) center electrode

94 Adjustments for Competition

 Chassis Adjustments
Refer to Safety Precautions on page 19.
Fork Height/Angle Wheelbase
The following suggestions may improve a
specific concern. Subtle changes in overall The position of the fork tubes in the clamps is Adjusting your CR’s wheelbase can offer subtle
handling may also be noted. adjustable. changes in overall handling. You may adjust
wheelbase by adding or removing links on the
Before making any chassis adjustments or drive chain. If you change the wheelbase, be
Rear End measuring wheel base, make sure the fork tubes sure to recheck race sag and adjust, if necessary.
are set to their proper position.
If you have a problem with rear wheel traction, In the past, a general rule was lengthen the
raise the rear end of your CR by increasing the Standard Position wheelbase to add straight line stability, shorten
rear spring pre-load. Instead of running 3.3 in Align the groove (1) in the outer tube with the the wheelbase to improve turning. However, we
(85 mm) of sag, you can run 3.1 in (80 mm) or 3.0 top surface of the upper fork clamp (2). suggest you do not lengthen the wheelbase of
in (75 mm) so the rear of the bike will sit a little your CR unless you are racing on a track with
higher. This should produce more traction more fast sections than normal.
because of the change to the swingarm and the
location of your CR’s center of gravity. (1) As a general recommendation, keep the
wheelbase as short as possible. This positions
If you have a problem with the steering head the wheels closer together, improves turning
shaking when you use the front brake hard or if response, increases weighting (traction) on the
your CR wants to turn too quickly, lower the rear rear wheel, and lightens weighting on the front
of the motorcycle by reducing the rear spring wheel.
pre-load. This will increase fork rake and trail (2)
and should improve stability in a straight line. With your CR, you will probably find that the
The effective suspension travel will be transferred standard setting or a shorter wheelbase will offer
toward the firmer end of wheel travel. more overall benefits.
(1) groove (2) upper fork clamp
Keep the race sag adjustment (page 82) in the 3.3
- 4.1 in (85 - 105 mm) range.

Adjustments for Competition 95

Gearing
Refer to Safety Precautions on page 19. However: For tight tracks, consider lower gearing to avoid
• the engine may not pull the higher gearing having to slip the clutch frequently. Repeated
You can “adjust” the power delivery of the • the spacing between gears may be too wide fanning or pulling of the clutch lever in a turn to
standard engine to suit track conditions by • engine rpm may be too low raise engine rpm may eventually damage the
changing gearing. This allows you to utilize a clutch system.
different portion of the engine’s power range at a Lower Gearing (more rear sprocket teeth)
given throttle setting. New gearing may provide • decrease top speed in each gear A gearing change may help for riding in sand,
the change you are looking for without the need • increases frequency of shifting (narrower gear where you want to keep the front end light so it
to consider further modifications. ratios) can float from the peak of one sand whoop to the
• increases engine rpm at a given throttle next. Generally, with higher gearing, it is easier
The portion of your engine’s power range you setting or ground speed (which may provide to maintain that perfect attitude (maximum rear
use can be adjusted by changing the final drive more power-to-the-ground on good traction wheel traction and a light front end) because you
ratio with different sized rear sprockets. Gearing surfaces) remain in the powerband longer in each gear.
changes allow you to more closely match the The higher gearing allows you to steer more
type of terrain and the available traction. However: efficiently with throttle control and body English.
Normally, a change of one tooth on the rear • spacing between gears may be too narrow
sprocket will be sufficient. • engine rpm may be too high If you are riding a track with sections where you
choose to over-rev the engine temporarily rather
There is a choice of both higher and lower final Some tracks may be watered heavily prior to the than shifting up, higher gearing might help.
drive ratios with two optional aluminum driven first race, then lightly or not at all during the day.
sprockets. For muddy or sandy courses, there is This results in a track surface that is slippery Sometimes you have to sacrifice performance on
a more durable steel driven sprocket with the during the first few races, then changes from one section of the track to gain a better overall
standard number of teeth. Like the optional seats good to great and back to good and possibly ends time. Your goal is the fastest overall lap time,
and springs, these sprockets are listed in the the day with a slick rock-hard consistency. even if the cost is some sections where the
Optional Parts List section of this manual. Ideally, your gearing should be adjusted to suit gearing feels wrong.
all these conditions.
Unless you have the required mechanical If you decide to try a gearing change, have
knowhow, tools, and an official Honda Service • Wet and slippery or sandy conditions: use a someone check your times with a stopwatch
Manual, sprocket changing should be done by higher gear (less teeth) to keep engine rpm (before and after the change) to get an accurate
your Honda dealer. down, and avoid unwanted wheelspin. The appraisal of the change. “Seat-of-the-pants”
engine may bog in certain corners so you’ll feelings can’t be trusted. Eliminating wheelspin
Higher Gearing (more rear sprocket teeth) need to slip the clutch to compensate; with a gearing change can make you feel like
• increases top speed in each gear (provided the downshifting may be too drastic a change in you’re going slower when, in reality, you’ve
engine will pull the higher gearing) speed. decreased your time by increasing your speed
• reduces frequency of shifting (wider gear • Average conditions: use the standard sprocket. with better traction.
ratios) • Hard (but not slippery) track conditions: use
• reduces engine rpm at a given throttle setting lower gearing (more teeth) to keep the engine These gearing recommendations should be
or ground speed (which may allow better rear rpm high where the engine produces the most evaluated by considering your ability, your riding
wheel traction on slippery or loose terrain) power. This may require an extra upshift on style, and the track.
certain sections or perhaps you can just rev it
out a bit longer.

96 Adjustments for Competition

 Tire Selection for Track Conditions
Refer to Safety Precautions on page 19. If you choose a tire with a sticky compound for
added traction, remember that it may transfer
Choosing the correct tire tread pattern and rubber additional loads to the transmission because it
compound can affect your placing in competition. grips so well, especially when riding in situations
The tires on your CR offer a “happy medium” for that normally place unusual demands on the
the variety of soil conditions the majority of transmission.
riders are likely to encounter.
Complete consumer information can be obtained
Experienced competitors often switch to tires from the various tire manufacturer representatives
developed for specific terrain conditions. If you and dealers.
do switch, stay with the factory recommended
sizes. Other tires may affect handling or Some general recommendations for specific
acceleration. terrain follow:

Be aware that tire sizes (width and aspect ratio) Hard, Slick Soil
do vary from manufacturer to manufacturer or Use tires with many relatively short knobs that
even among tires made by the same are close together in order to obtain the largest
manufacturer. Variations in tires, especially the possible contact patch on the surface. The rubber
sidewall profile, can change the attitude of your compound needs to be softer for hard ground in
CR and its handling. Tire variations that raise or order to hook up, but not so soft that the knobs
lower the rear of your CR have a more significant roll over easily and affect holding a straight line.
effect on handling than variations in front tires These tires tend to wear more quickly than
which, generally, don’t vary as much. standard tires because of the combination of soft
Often, you can see or feel the change in tire size. rubber and hard terrain.
Another way to check is to measure the rolling
circumference of the old and new tires. A higher Muddy Soil
profile tire will have a larger rolling Use a more open tread pattern to avoid clogging.
circumference. For these conditions, the relatively long knobs
will probably be made from a harder rubber
If you do switch to tires designed for special compound to reduce any tendency to bend back
terrain use, remember they will be less acceptable under acceleration or wear quickly.
in other circumstances. For example, an
aggressive mud tire will give excellent grip on Loose, Sandy Soil
wet, loamy terrain, but less impressive grip on a Use a tire that is similar in construction to those
hard surface. needed for tacky soil and mud, but with a few
more knobs.

Adjustments for Competition 97

Personal Fit Adjustments
Refer to Safety Precautions on page 19. As an alternative, consider wrapping the • Handlebar width can be trimmed with a
handlebar area under the control assemblies with hacksaw to better suit your particular shoulder
The following suggestions may make your ride teflon tape. Then tighten the assemblies to their width and riding preference. Think this
both more comfortable and more responsive to normal torque. Upon impact, the fully-tightened through carefully and cut off just a small
your control input. assemblies should rotate on the Teflon tape. amount at a time from both sides equally. It is
obviously much easier to make the handlebar
• Position the shift lever and brake pedal so that narrower than it is to add material.
Control Positioning they are close to your boot for rapid access,
but not so close that either is depressed when
• Position the control levers so that you can use sitting or standing comfortably on your CR.
them comfortably when seated and standing.
• Adjust the control lever mounting bolt torque
of the clutch and brake lever assemblies so
that they can rotate on the handlebar in a fall.
If an assembly does not rotate, it may bend or
break a control lever. Make sure that the bolts
are torqued securely enough to prevent
slippage during normal operation.

Apply Pro Honda Hondalock or an equivalent to

the threads of these bolts prior to adjustment to • Chamfer the edges to remove burrs and other
help ensure the correct torque is retained. irregularities or roughness after sawing the
Tighten the top bolts first. handlebar.
• An alternate handlebar shape, through varying
Handlebar Position, Width & Shape rise or rearward sweep dimensions, will
provide further adjustment to riding position
• Position the handlebar so that both gripping and may better suit your particular body size
the bar and operating the controls is or riding style. Each of the ergonomic
comfortable while both seated and standing, dimensions of the machine were determined
while riding straight ahead and turning. to suit the greatest possible number of riders
Tighten the forward bolts first. based on an average size rider.

(1)

(1) control lever mounting bolts

98 Adjustments for Competition

 Tips
Here’s helpful advice on how to transport and Transporting Your Motorcycle .........................100
store your Honda, as well as two troubleshooting Storing Your Honda..........................................101
flow charts. You & the Environment ...................................102
Troubleshooting................................................103

Tips 99
Transporting Your Motorcycle
If you use a truck or motorcycle trailer to
transport your Honda, we recommend that you
follow these guidelines:
• Use a loading ramp.
• Make sure the fuel valve is off.
• Secure the motorcycle in an upright position,
using motorcycle tie-down straps. Avoid
using rope, which can loosen and allow the
motorcycle to fall over.

To secure your CR, brace the front wheel against

the front of the truck bed or trailer rail. Attach
the lower ends of two straps to the tie-down
hooks on your vehicle. Attach the upper ends of
the straps to the handlebar (one on the right side,
the other on the left), close to the fork.

Check that the tie-down straps do not contact any

control cables or electrical wiring.

Tighten both straps until the front suspension is

compressed about half-way. Too much pressure
is unnecessary and could damage the fork seals.

Use another tie-down strap to keep the rear of the

motorcycle from moving.

We recommend that you do not transport your

CR on its side. This can damage the motorcycle,
and leaking gasoline could be a
hazard.

100 Tips
 Storing Your Honda
If you won’t be riding for an extended period, 3. Remove the coolant drain bolts (1) from the 8. Stuff a rag into the silencer outlet. Then tie a
such as during the winter, thoroughly inspect cylinder (2) and water pump (3) to drain plastic bag over the end of the muffler to
your Honda and correct any problem before coolant. prevent moisture from entering.
storing it. That way, needed repairs won’t be After the coolant has been completely 9. Store your CR in an unheated area, free of
forgotten and it will be easier to get your drained, ensure that the drain bolt sealing dampness, away from sunlight, with a
CR running again. washers are in good condition and reinstall the minimum of daily temperature variation.
drain bolts. 10.Cover your CR with a porous material. Avoid
To reduce or prevent deterioration that can occur (2) (1) using plastic or similar non-breathing, coated
during storage, also follow the following materials that restrict air flow and allow heat
procedures. (3) and moisture to accumulate.

Preparation for Storage Removal from Storage

1. Completely clean all parts of your CR. If 1. Uncover and clean your CR.
your CR has been exposed to sea air or salt Change the transmission oil if more than 4
water, wash it down with fresh water and wipe months have passed since the start of storage.
dry. (1) (1) 2. Uncover the end of the muffler and remove
2. Drain the fuel tank and carburetor into an the rag from the muffler outlet.
approved gasoline container. (1) drain bolts (3) water pump 3. Fill the fuel tank with pre-mixed fuel
Turn the fuel valve OFF and remove the (2) cylinder (page 34).
carburetor drain bolt. Drain gasoline into an 4. Pour a fresh recommended coolant mixture
approved container. Reinstall the drain bolt. 4. Lubricate the drive chain. (page 38) slowly into the radiator filler hole
5. Remove the spark plug and pour a tablespoon up to the filler neck.
(0.51 - 0.68 US oz; 15 - 20 cm3) of clean 2-
WARNING stroke engine oil into the cylinder. With the Capacity:
Gasoline is highly flammable and spark plug grounded or the engine stop button 0.45 US qt (0.43 x)
explosive. You can be burned or pressed in, operate the kickstarter several at disassembly
seriously injured when handling fuel. times to distribute the oil, then reinstall the 0.45 US qt (0.43 x)
spark plug. at draining
• Stop the engine and keep heat, sparks
and flame away. NOTICE Lean your CR slightly right and left several
• Handle fuel only outdoors. times to bleed trapped air in the cooling
• Wipe up spills immediately. When turning the engine over, the engine stop system.
button should be pressed in, and the spark plug If the coolant level lowers, add coolant and
placed in its cable cap and grounded to prevent repeat the above procedure.
damage to the ignition system. Install the radiator cap securely.
5. Perform all maintenance checks (page 9).
6. Inflate the tires to their recommended
pressures.
7. Place your CR on the optional workstand or
equivalent to raise both tires off the ground.

Tips 101
You & the Environment
Owning and riding a motorcycle can be NOTICE
enjoyable, but you must do your part to protect
nature. When you show respect for the land, Improper disposal of drained fluids is harmful to
wildlife, and other people, you also help preserve the environment.
the sport of off-road riding.

Following are tips on how you can be an

environmentally-responsible motorcycle owner.

• Choose Sensible Cleaners. Use a

biodegradable detergent when you wash your
CR. Avoid aerosol spray cleaners that contain
chlorofluorocarbons (CFCs) which damage
the atmosphere’s protective ozone layer. Don’t
throw cleaning solvents away; see the
following guidelines for proper disposal.

• Recycle Wastes. It’s illegal and thoughtless to

put used engine oil in the trash, down a drain,
or on the ground. Used oil, gasoline, and
cleaning solvents contain poisons that can hurt
refuse workers and contaminate our drinking
water, lakes, rivers, and oceans.
Before changing your oil, make sure you have
the proper containers. Put oil and other toxic
wastes in separate sealed containers and take
them to a recycling center. Call your local or
state office of public works or environmental
services to find a recycling center in your
area, and to get instructions on how to dispose
of nonrecyclable wastes.

102 Tips
 Troubleshooting
The items that are serviceable using this Manual are Poor performance at high speed
followed by the page number reference in parenthesis. The CHECK POSSIBLE CAUSES
items that require use of the Honda Service Manual are 1. Check ignition INCORRECT • Faulty alternator*
followed by an asterisk (＊). timing* • Faulty ignition control
module*
• Faulty ignition pulse
Poor performance at low and idle speeds CORRECT generator*
CHECK POSSIBLE CAUSES
1. Check ignition INCORRECT • Faulty ignition control 2. Disconnect fuel • Lack of fuel in tank (P. 35)
FUEL FLOW
timing* module* line at carburetor RESTRICTED • Clogged fuel line (P. 35)
• Faulty alternator* and check for • Clogged fuel fill cap
CORRECT • Faulty ignition pulse clogging (P. 35) breather tube (P. 35)
generator • Clogged fuel valve (P. 35)
• Clogged fuel filter (P. 35)
2. Check carburetor INCORRECT • Fuel-air mixture too UNRESTRICTED
air screw lean (Turn the air FUEL FLOW
adjustment (P. 91) screw in) (P. 91)
• Fuel-air mixture too 3. Remove air DIRTY • Not cleaned
rich (Turn the air cleaner (P. 40) frequently enough
CORRECT screw out) (P. 91) (P. 40)
AIR FILTER
3. Check if air INCORRECT • Over-oiled air clean- NOT DIRTY
cleaner is er.
overoiled (P.40) 4. Check carburetor CLOGGED • Contaminants in the
jets for clogging fuel
CORRECT

NOT CLOGGED
4. Check if the LEAKING • Deteriorated reed
insulator is valve gasket 5. Install a larger CONDITION • Jet size wrong, reject
leaking* • Loose caburetor* carburetor main WORSE in the opposite
jet (P. 89) direction (P. 89)
NOT LEAKING

5. Try spark test WEAK OR • Faulty, carbon or wet

INTERMITTENT fouled spark plug (P. 94)
GOOD SPARK SPARK • Faulty ignition control
module*
• Faulty alternator*
• Faulty ignition coil*
• Broken or shorted
spark plug wire

Tips 103
104 Tips
 Technical Information
This section contains dimensions, capacities, and Vehicle Identification .......................................106
other technical data. Specifications ...................................................107
Torque Specifications .......................................109
High Altitude Carburetor Adjustment ..............111
Oxygenated Fuels.............................................112
Competition Logbook ......................................113
Optional Parts List............................................115
Spare Parts & Equipment.................................117
Wiring Diagram................................................118

Technical Information 105

Vehicle Identification
The VIN (1) is stamped on the right side of the
Serial Numbers steering head.

The VIN and engine serial numbers are required RIGHT SIDE
when you register your CR. They may also be
required when ordering replacement parts. You
may record these numbers in the Quick
Reference section at the rear of the manual.
(1)

(1) VIN

The engine number (2) is stamped on the left

crankcase.

LEFT SIDE

(2)

(2) engine number

106 Technical Information

 Specifications
CR85R Item English Metric Item English Metric
Item English Metric Engine Drive train
Dimension Type Liquid cooled, 2-stroke Final reduction 3.267
Overall length 71.0 in 1,803 mm Cylinder arrangement Single 15° inclined from Left foot-operated return
vertical Gear shift pattern system 1-N-2-3-4-5-6
Overall width 30.3 in 769 mm
Overall height 44.3 in 1,126 mm Bore and stroke 1.87 × 1.88 in 47.5 × 47.8 mm Electrical
Wheelbase 49.1 in 1,248 mm Displacement 5.17 cu-in 84.7 cm3 lgnition ICM
Seat height 32.4 in 824 mm Compression ratio 8.45 : 1 Starting system Kickstarter
Foot peg height 14.8 in 376 mm Transmission oil Spark plug: Standard NGK
capacity BR10EG
Ground clearance 12.2 in 311 mm After draining 0.58 US qt 0.55 x Spark plug gap 0.02-0.03 in
Frame After disassembly 0.63 US qt 0.60 x (0.6-0.7 mm)
Type Semi double cradle Cooling system,
Telescopic fork, capacity
F. suspension travel 9.6 in (245 mm) After draining 0.45 US qt 0.43 x
stroke 10.8 in (275 mm) After disassembly 0.45 US qt 0.43 x
Pro-link, Carburetor
R. suspension travel 10.8 in (275 mm)
Type Piston valve
70/100-17 40M
Tire size, front Identification number PWK10A
DUNLOP K490G
90/100-14 49M Main jet (standard) #142
Tire size, rear DUNLOP K695 Slow jet (standard) #45
Tire type bias-ply, tube type Air screw opening 2 turns out
Tire pressure, front Float height 0.75 in 19.0 mm
(cold) 15 psi (100 kPa, 1.0 kgf/cm2)
Drive train
Tire pressure, rear Clutch type Wet, multi-plate type
(cold) 15 psi (100 kPa, 1.0 kgf/cm2)
Transmission 6-speed, constant mesh
Single disc brake
F. brake, swept area 55.5 in2 (358.1 cm2) Primary reduction 4.117
Single disc brake Gear ratio I 2.267
R. brake, swept area 40.0 in2 (257.8 cm2) Gear ratio II 1.722
unleaded gasoline, pump Gear ratio III 1.400
Fuel recommendation octane number of 91 or Gear ratio IV 1.174
higher
Gear ratio V 1.042
Fuel capacity 1.35 US gal 5.1 x Gear ratio VI 0.920
Caster angle 26°51′
Trail length 3.02 in 76.7 mm
Fork oil
(per leg) level (Std.) 4.0 in 101 mm

Technical Information 107

Specifications
CR85RB Item English Metric Item English Metric
Item English Metric Engine Drive train
Dimension Type Liquid cooled, 2-stroke Final reduction 3.667
Overall length 74.1 in 1,881 mm Cylinder arrangement Single 15° inclined from Left foot-operated return
vertical Gear shift pattern system 1-N-2-3-4-5-6
Overall width 30.3 in 769 mm
Overall height 46.1 in 1,170 mm Bore and stroke 1.87 × 1.88 in 47.5 × 47.8 mm Electrical
Wheelbase 50.7 in 1,289 mm Displacement 5.17 cu-in 84.7 cm3 lgnition ICM
Seat height 34.0 in 864 mm Compression ratio 8.45 : 1 Starting system Kickstarter
Foot peg height 16.4 in 417 mm Transmission oil Spark plug: Standard NGK
capacity BR10EG
Ground clearance 13.9 in 353 mm After draining 0.58 US qt 0.55 x Spark plug gap 0.02-0.03 in
Frame After disassembly 0.63 US qt 0.60 x (0.6-0.7 mm)
Type Semi double cradle Cooling system,
Telescopic fork, capacity
F. suspension travel 9.6 in (244 mm) After draining 0.45 US qt 0.43 x
stroke 10.8 in (275 mm) After disassembly 0.45 US qt 0.43 x
Pro-link, Carburetor
R. suspension travel 11.5 in (292 mm)
Type Piston valve
70/100-19 42M
Tire size, front Identification number PWK10A
DUNLOP K490
90/100-16 52M Main jet (standard) #142
Tire size, rear DUNLOP K695 Slow jet (standard) #45
Tire type bias-ply, tube type Air screw opening 2 turns out
Tire pressure, front Float height 0.75 in 19.0 mm
(cold) 15 psi (100 kPa, 1.0 kgf/cm2)
Drive train
Tire pressure, rear Clutch type Wet, multi-plate type
(cold) 15 psi (100 kPa, 1.0 kgf/cm2)
Transmission 6-speed, constant mesh
Single disc brake
F. brake, swept area 55.5 in2 (358.1 cm2) Primary reduction 4.117
Single disc brake Gear ratio I 2.267
R. brake, swept area 40.0 in2 (257.8 cm2) Gear ratio II 1.722
unleaded gasoline, pump Gear ratio III 1.400
Fuel recommendation octane number of 91 or Gear ratio IV 1.174
higher
Gear ratio V 1.042
Fuel capacity 1.35 US gal 5.1 x Gear ratio VI 0.920
Caster angle 27°25′
Trail length 3.63 in 92.3 mm
Fork oil
(per leg) level (Std.) 4.0 in 102 mm

108 Technical Information

 Torque Specifications
Nuts, Bolts, Fasteners Torque
Check and tigthen nuts, bolts, fasteners before every outing. Item Remarks
lbf•ft N•m kgf•m
(8) (9) FRAME
(5) 1 Steering stem nut 94 128 13.1
(2) 2 Top thread nut 4.4 5.9 0.6
(1) 3 Fork bridge upper pinch
(3) bolts 16 22 2.2
(15) 4 Fork bridge lower pinch
bolts 16 22 2.2
5 Handlebar upper
(11) holders 16 22 2.2
6 Throttle holder 7 10 1.0
7 Brake lever pivot 4.4 5.9 0.6
8 Clutch lever pivot bolt 0.7 1 0.1
9 Clutch lever pivot nut 4.4 5.9 0.6
10 Front brake master
cylinder holder 9 12 1.2
11 Brake hose guide
(13) bolt 3.8 5.2 0.5
12 Front axle nut 46 62 6.3 NOTE 4
13 Rear axle nut 65 88 9.0 NOTE 4
14 Engine hanger bolts 24 32 3.3
15 Shock absorber (upper) 32 44 4.5 NOTE 4
(lower) 32 44 4.5
16 Swingarm pivot nut 58 78 8.0
17 Fork cap 25 34 3.5
(14) 18 Rear shock arm
(16) (19) (swingarm side) 44 59 6.0 NOTE 4
(12) (18) (shock link side) 44 59 6.0 NOTE 4
19 Rear shock link nuts
(Frame side) 44 59 6.0 NOTE 4
(10) 20 Shock spring lock nut 65 88 9.0
(6) (7) NOTES: 1. Apply Pro Honda Hondalock or an equivalent to the
threads.
(17) 2. Apply oil to the threads and flange surface.
3. Stake.
4. U-nut.
5. UBS nut.
6. SH bolt.
(20) (4) 7. Alock bolt.

(18)

Technical Information 109

Torque Specifications
Torque
Item Remarks
lbf•ft N•m kgf•m
FRAME
(28) (33) 21 Caliper mount bolts
Front 22 30 3.1 NOTE 1
Rear 11 15 1.5
22 Front brake disc nuts 15 20 2.0 NOTE 4
23 Rear brake disc nuts 15 20 2.0 NOTE 4
24 Brake pedal pivot bolt 24 32 3.3
25 Shift lever 12 16 1.6
26 Spokes 2.7 3.7 0.4
(22) 27 Rim locks 9 12.4 1.3
(26) 28 Subframe bolt (upper) 16 22 2.2
(lower) 16 22 2.2
29 Fork piston rod lock nut 15 19.7 2.0
30 Fork protector bolts 5.2 7 0.7 NOTE 1
(27) 31 Expansion chamber
mounting bolt (front) 6.5 8.8 0.9
(rear) 6.5 8.8 0.9
32 Sprocket nuts
Drive 10 13 1.3
(25) Driven 24 32 3.3 NOTE 4
(32) 33 Seat mounting bolts 19 26 2.7
(28) 34 Pressure release screw 1.0 1.3 0.1
(21) (32) NOTES: 1. Apply Pro Honda Hondalock or an equivalent to the
threads.
2. Apply oil to the threads and flange surface.
3. Stake.
4. U-nut.
5. UBS nut.
(34) 6. SH bolt.
7. Alock bolt.

(29)

(26)

(27)

(31)

(24)

(23) (21) (30)

110 Technical Information

 High Altitude Carburetor Adjustment
When operating this motorcycle at high altitude,
the air-fuel mixture becomes overly rich.

Above 6,500 feet (2,000 m), driveability and

performance may be reduced and fuel
consumption increased. The carburetor can be
modified to compensate for this high altitude
richness.

However, the carburetor must be returned to

standard factory specifications when lower
altitude riding is desired. See your Honda dealer
for high altitude modification.

NOTICE

Sustained operation at altitudes below 5,000 feet

(1,500 m) with high altitude carburetor
modifications may cause engine overheating and
damage.

Technical Information 111

Oxygenated Fuels
Some 1an ether compound. These symptoms, try another service station or switch
gasolines are collectively referred to as to another brand of gasoline.
oxygenated fuels. To meet clean air standards,
some areas of the United States and Canada use Fuel system damage or performance problems
oxygenated fuels to help reduce emissions. resulting from the use of an oxygenated fuel
containing more than the percentages of
If you use an oxygenated fuel, be sure it is oxygenates mentioned above are not covered
unleaded and meets the minimum octane rating under warranty.
requirement.
Oxygenated fuels can damage paint and plastic.
Before using an oxygenated fuel, try to confirm Be careful not to spill fuel when filling the fuel
the fuel’s contents. Some states/provinces tank. Wipe up any spills immediately.
require this information to be posted on the
pump. NOTICE
The following are the EPA-approved percentages Oxygenated fuels can damage paint and plastic.
of oxygenates:

ETHANOL (ethyl or grain alcohol) 10% by

Volume
You may use gasoline containing up to 10%
ethanol by volume. Gasoline containing ethanol
may be marketed under the name “Gasohol”.

MTBE (Methyl Tertiary Butyl Ether) 15% by

Volume
You may use gasoline containing up to 15%
MTBE by volume.

METHANOL (methyl or wood alcohol) 5% by

Volume
You may use gasoline containing methanol
containing up to 5% methanol by volume as long
as it contains cosolvents and corrosion inhibitors
to protect the fuel system. Gasoline containing
more than 5% methanol by volume may cause
starting and/or performance problems. It may
also damage metal, rubber, and plastic parts of
your fuel system.

If you notice any undesirable operating

112 Technical Information

 Competition Logbook
Any serious competition effort relies heavily on Tuning & Adjustment Records Racing Records
the knowledge gained and compiled from Keep track of the settings and adjustments that Information worth recording for this section of
previous racing events. The best way to organize worked best at a particular location. These items your logbook may include:
the many bits of information is to record them in include: • Your placing in each moto and overall
a logbook. • basic track conditions, altitude, and finishing position.
temperature • Thoughts on what you could do to improve
Your logbook can include such information as • carburetion changes your performance next time.
suspension adjustments, carburetor adjustments, • suspension settings • Notes on any patterns noted in choice of
gearing, and tire selection. This detailed • chassis adjustments tested and selected starting gate positions or in riding portions of
information, along with your comments, can • gearing the course as the day progressed that may
prove valuable when you compete at the same • tire selection prove helpful in future events.
track or on similar terrain. • air pressure • Any places on the course where you chose the
wrong line and were passed too easily.
Your logbook can also tell you when Competition Records • Notes on strategy used by your competition or
maintenance was performed and when it will be • your placings by riders in another event that are worth
necessary again. Your logbook also lets you • thoughts to improve performance next time: remembering.
record any repairs and lets you keep track of the both yours and your CR’s
running time on the engine and suspension • strategy notes Maintenance Records
components. Regular maintenance items you’ll want to record
Maintenance Records in your logbook should include:
If you choose to sell your CR, the accurate • regular interval maintenance • Dates and results of cylinder, piston and ring
maintenance records in your logbook might be • repairs examinations.
the deciding deal-maker for a potential buyer. • running time on engine • Patterns for frequency of need for
• running time on suspension components decarbonization with a particular oil.
Consider using different color pens or pencils to • When you last performed shock linkage and
record important information on specific subjects. Timekeeping swingarm pivot bearing maintenance.
For example, record results in black, jetting This Manual lists maintenance intervals for • Transmission, fork and shock oil changes.
changes in red, suspension/chassis settings in every-so-many races or every-so-many hours of • Chain, sprocket, chain guide and slider
blue, and gearing selections in green. Color running. replacements.
codes will help you identify the information you • Coolant changes and related component
want with a glance. Because all races are not the same, the most replacements.
effective way to schedule maintenance is by the • Spark plug, brake pad and control cable
hours you have run your CR. replacements.

An official “guestimate” is close enough for our In addition, you should record any irregularities
timekeeping purposes. You may choose to record noted in component wear so you’ll remember to
your time the same way aircraft operators do (but keep a close eye on these areas in the future.
without the benefit of an electrical hourmeter).
All running time is broken down into hours and
tenths of an hour (each six minutes represents
one tenth of an hour).

Technical Information 113

Competition Logbook
Date Running Location/Event Comments (Jetting, Suspension Settings, Gearing, Chassis Adjustments, Maintenance
Time Performed, etc.)

(Make several photocopies of this page for future use)

114 Technical Information

 Optional Parts List
These parts and tools may be ordered from your FRAME REMARKS FRAME REMARKS
authorized Honda dealer.
< >: Drive chain links Shock CR85R
CARBURETOR Remarks 48T, Aluminum <116> springs
CR85R
49T, Aluminum <116> (Standard)
Driven 50T, Aluminum <116> Softer 4.6 kgf/mm Brown mark
Main jet #130 - #155 (in increments of 2 or 3)
(Standard: #142) (11 sizes) sprocket < >: Drive chain links
54T, Aluminum <124> Red mark
CR85RB 4.8 kgf/mm
55T, Aluminum <124> (Standard)
56T, Aluminum <124>
RK420MSZ1: Standard 5.0 kgf/mm White mark
Size Drive Standard 116 Links (CR85R)
chain 124 Links (CR85RB)
Slow jet #40 - 50 (in increments of 2 or 3) 5.2 kgf/mm No mark
Optinal RK420MSZ1: 130 Links
(Standard: #45)

Jet Needles Stiffer 5.4 kgf/mm Black mark

Standard needle: NFSF
Straight diameter: ø2.415 mm

MARK Rider Weight

Jet needle
number
Specific flow Jet needle
(1/2 clip
characteristics number
position richer
at 1/16 to 1/4 (standard
than standard
throttle series)
at 1/8 to 3/4
throttle)
The maximum load capacity is 150 lbs. Rider
Rich NFSE NBKE weight must not exceed this limit.
ø2.405 ø2.405

(standard
needle) NBKF
NFSF ø2.415
ø2.415

NFSG NBKG
Lean ø2.425 ø2.425

Technical Information 115

Optional Parts List
FRAME REMARKS FRAME REMARKS

Shock CR85RB Fork CR85R

springs springs
2-coils at
Softer 4.8 kgf/mm Red mark Softer 0.26 kgf/mm both ends

5.0 kgf/mm White mark 1-coil at

Standard 0.28 kgf/mm both ends

Standard 5.2 kgf/mm No mark

2-coils at
Stiffer 0.30 kgf/mm one end;
5.4 kgf/mm Black mark 1-coil at
other end
Blue mark CR85RB
Stiffer 5.6 kgf/mm
2-coils at
Softer 0.26 kgf/mm both ends
Rider Weight
1-coils at
Standard 0.28 kgf/mm both ends

2-coils at
Stiffer 0.30 kgf/mm one end;
1-coils at
other end

The maximum load capacity is 150 lbs. Rider TOOLS REMARKS

weight must not exceed this limit.
Workstand For maintenance

Air gauge For checking tire air pressure.

Pin spanner To adjust spring preload (two

spanners required)

116 Technical Information

 Spare Parts & Equipment
There are numerous spare parts you can take to Additional Spares
an event to help ensure you get in a full day of front brake master cylinder Chemical Products
riding. In addition to the usual nuts and bolts, rear brake assembly
consider the following: front & rear brake hoses Pro Honda GN4 4-stroke Oil (Transmission Oil)
wheels & tires (front & rear, mounted) Pro Honda HP Fork Oil 5W
clutch plates & transmission oil Pro Honda HP2 2-stroke Oil
Spare Parts seat Pro Honda DOT4 Brake Fluid
ignition components Pro Honda Chain Lube
spark plugs top end-complete Pro Honda Foam Filter Oil
air cleaner (clean & oiled, sealed in a plastic bag) radiator hoses Honda Contact Cleaner
optional carburetor jets/needles radiator shrouds (L & R) Pro Honda Dielectric Grease
chain & masterlinks brake hoses (front & rear) Pro Honda Handgrip Cement
chain guide slider Pro Honda Hondalock
chain roller Pro Honda Moly 60 Paste (U.S.A. only) or
inner tubes (front & rear) General Tools molybdenum disulfide paste (containing more
fenders than 40% molybdenum disulfide additive)
footpegs sockets (3/8 in drive) Pro Honda White Lithium Grease
front & side number plates screwdrivers: blade & Phillips No. 1, 2, 3 Wheel Bearing Grease
handlebar wrench, large adjustable Silicone Sealer
grips wrenches: open end & box high-temperature grease
levers (brake & clutch) wrenches: hex (Allen) Pro Honda HP coolant
clutch lever handlebar mount wrench, spoke Pro Honda Hondabrite
clutch cable torque wrench (metric scale, click-stop style) Urea based multi-purpose grease designed for
throttle assembly pliers: standard, needle-nose, channel-lock set high temperature, high pressure performance
throttle cable hammer, plastic head (example: EXELITE EP2 manufactured by
shift lever syringe with adjustable stop KYODO YUSHI, Japan or Shell stamina Ep2 or
brake pedal tire pressure gauge equivalent)
spokes (front & rear, each side) tire irons
driven sprockets (larger & smaller than standard, tire pump or air tank
for gearing changes & collision damage replace- feeler gauge set Other Products
ment) Vernier caliper (metric)
assorted nuts, bolts, washers, screws, cotter pins pressure/vacuum testing equipment (USA only) safety wire
mechanic’s wire
duct tape
Honda Special Tools plastic tie-wraps
hose clamps
Any special tools for your CR purchased from drop light
your Honda dealer.
flywheel puller 07733-0010000

Technical Information 117

Wiring Diagram

118 Technical Information

 Consumer Information
This section contains information about Authorized Manuals .........................................120
contacting Honda and how to get an official Contacting Honda.............................................121
Honda service manual. Your Honda Dealer...........................................122
The Honda Rider’s Club
(USA only) .......................................................123

Consumer Information 119

Authorized Manuals
The Service Manual used by your authorized Honda dealer is available from NOTE: Dealers and Companies, please provide dealer or company name, and also the
Helm, Inc. name of the person to whose attention the shipment should be sent. For purchases
outside U.S.A., please write to the address shown below for a quotation.

Also available but not necessary to service your model is the Honda Common
Service Manual which explains theory of operation and basic service S
information for various systems common to all Honda motorcycles, motor Customer Name
scooters and ATVs.
H
I Attention
These Honda manuals are written for the professional technician, but most P
mechanically-capable owners should find them helpful if they have the proper T Street Address-No P.O. Box Number Apt. #
tools and skills. Special Honda tools are necessary for some procedures. O
City State Zip Code
Publication Item No. Description Price Each*
61GBF12 2007 CR85R/RB Service Manual $38.00 Daytime Telephone Number ( )

61CM002 Common Manual $48.00

31GBF740 2007 CR85R/RB EXPERT Owner’s Manual $16.00
*Prices are subject to change without notice and without incurring obligation.

Order On-Line: www.helminc.com

Check or money order enclosed payable to Helm, Inc. U.S. funds only. Do not
Order Toll Free: 1-888-CYCLE93 (1-888-292-5393) send cash.

(NOTE: For Credit Card Orders Only) P

Check here if your billing
Monday - Friday 8:00 AM - 6:00 PM EST A Master
Card VISA Discover
address is different from the
shipping address shown above.
OR Y
By completing this form you can order the materials desired. You can pay by M Account Number
check or money order, or charge to your credit card. Mail to Helm, E
Incorporated, at the address shown on this order form.
Canada: See your Honda dealer to order authorized manuals. N Expiration Date: Mo. Yr
T —

Publication Price Total

Item No. Item Description Qty. Each* Price Customer Signature Date

These Publications cannot be returned for credit without receiving advance authorization within
14 days of delivery. On returns, a restocking fee may be applied against the original order.

Sub Total
*Prices are subject to change without notice and Purchaser's Sales Tax
without incurring obligation. Mich. Add 6%
Calif. Add 8.25% HELM P.O. BOX 07280, DETROIT, MICHIGAN 48207
Orders are mailed within 10 days. Please allow ade- Handling $5.00
quate time for delivery. Charge
Grand Total

120 Consumer Information

 Contacting Honda
Your owner’s manual was written to cover most Motorcycle Division, American Honda Motor
of the questions you might ask about your Co., Inc., P.O. Box 2220, Torrance CA 90509-
Honda. Any questions not answered in the 2220, mailstop: 100-4C-7B,
owner’s manual can be answered by your Honda telephone: (866) 784-1870.
dealer. If he doesn’t have the answer right away,
he will get it for you. Canada: Refer to the warranty booklet that was
supplied with your vehicle.
If you have a difference of opinion with your
dealer, please remember that each dealership is Please include the following information in your
independently owned and operated. That’s why letter:
it’s important to work to resolve any differences
at the dealership level. • name, address, and telephone number
• product model, year, and VIN
If you wish to comment on your experiences with • date of purchase
your Honda or with your dealer, please send your • dealer name and address
comments to the following address (USA only):
We will likely ask your Honda dealer to respond,
or possibly acknowledge your comments directly.

Consumer Information 121

Your Honda Dealer
Once you purchase your new Honda, get familiar Your dealer can inform you about competition
with the organization of your Honda dealer so events in your area. You’ll also find that your
you can utilize the full range of services dealer is a source of information (USA only) the
available. Honda Rider’s Club of America.

The service department is there to perform We’re sure you’ll be as pleased with the service
regular maintenance and unexpected repairs. It your Honda dealer continues to provide after the
has the latest available service information from sale as you are with the quality and dependability
Honda. of your Honda.

The parts department offers Genuine Honda

parts, Pro Honda products, Hondaline accessories
(USA only), and Honda accessories and products
(Canada only). The same quality that went into
your Honda can be found in Genuine Honda
replacement parts. You’ll also find comparable
quality in the accessories and products available
from the parts department.

122 Consumer Information

 The Honda Rider’s Club (USA only)
One of the best ways to get the most enjoyment Contact your Honda dealer for more information
from owning and riding your Honda is through or call: 1-800-847-4722 or log on to
the Honda Rider's Club of America. Your www.hrca.honda.com
purchase of a new motorcycle, scooter, ATV or
PWC from a participating U.S. Honda dealer
entitles you to a complimentary one-year
membership in the Club. There are hundreds of
HRCA Chapter-sponsoring dealers across the
USA with events and activities almost every
weekend.
Membership benefits include:
• 24-hour, toll-free roadside assistance for your
new Honda (includes roadside assistance for
your transport vehicle [up to one ton] as long
as your Honda is aboard or in tow). For
street-legal motorcycles and scooters only.
• An exclusive HRCA website complete with
access to the official Honda Common Service
Manual, contests, insider information and
more.
• Reimbursement (up to $75) for successful
completion of a Motorcycle Safety
Foundation training course. Separate, compli-
mentary training from the Specialty Vehicle
Institute of America for purchasers of new
ATVs.
• One full year of Honda Red Rider magazine
(six issues).
• Discounts from HRCA partners for
experienced rider courses.
• Discounted vehicle insurance from the
HRCA’s insurance partner.
• Racing contingency programs and assistance
at selected dual-sport, off-road, and motocross
events for off-road motorcycles and selected
ATVs.

If you purchased an off-road motorcycle, ATV or

PWC, your benefits do not include roadside
assistance or trip interruption protection.

Consumer Information 123

Table of Contents
The following presents the contents for each SERVICING YOUR HONDA .........................17 Chassis
section of your owner's manual. Before You Service Your Honda Suspension..........................................................52
The Importance of Maintenance ........................18 Brakes.................................................................57
MOTORCYCLE SAFETY................................1 Maintenance Safety ............................................19 Wheels ................................................................61
Important Safety Information...............................2 Important Safety Precautions........................19 Tires & Tubes .....................................................62
Important Safety Precautions..........................2 Maintenance Schedule .......................................20 Drive Chain ........................................................64
Important Message to Parents.........................2 General Competition Maintenance ....................22 Expansion Chamber ...........................................67
Accessories & Modifications ...............................3 Before & After Competition Maintenance.........26 Additional Maintenance Procedures ..................68
Safety Labels ........................................................4 Between Motos & Practice Maintenance .....26
After Competition Maintenance ...................27 Appearance Care ................................................69

OPERATING CONTROLS...............................5
Operation Component Locations .........................6 Service Preparations ADJUSTMENTS FOR COMPETITION ......71
Maintenance Component Locations...................28 Front Suspension Adjustments...........................72
Seat Removal......................................................29 Rear Suspension Adjustments ............................80
BEFORE RIDING..............................................7 Fuel Tank Removal ............................................30 Suspension Adjustments for Track Conditions ..84
Are You Ready to Ride?.......................................8 Subframe Removal .............................................32 Suspension Adjustment Guidelines....................85
Is Your Motorcycle Ready to Ride? .....................9 Carburetor Adjustments & Tuning Tips .............88
Pre-ride Inspection..........................................9 Chassis Adjustments...........................................95
Service Procedures Gearing ...............................................................96
Fluid & Filters Tire Selection for Track Conditions...................97
BASIC OPERATING INSTRUCTIONS........11 Fuel System ........................................................34 Personal Fit Adjustments ...................................98
Safe Riding Precautions................................12 Transmission Oil ................................................36
Starting & Stopping the Engine .........................13 Coolant ...............................................................38
Preparation ....................................................13 Air Cleaner .........................................................40 TIPS ..................................................................99
Starting Procedure ........................................13 Transporting Your Motorcycle .........................100
Flooded Engine .............................................13 Storing Your Honda..........................................101
How to Stop the Engine................................14 Engine You & the Environment ...................................102
Shifting Gears.....................................................15 Throttle ...............................................................42 Troubleshooting................................................103
Break-in Guidelines ...........................................16 Clutch System ....................................................44
Spark Plug ..........................................................46
Cylinder System .................................................47

124 Table of Contents

 Table of Contents
TECHNICAL INFORMATION ...................105
Vehicle Identification .......................................106
Specifications ...................................................107
Torque Specifications .......................................109
High Altitude Carburetor Adjustment ..............111
Oxygenated Fuels.............................................112
Competition Logbook ......................................113
Optional Parts List............................................115
Spare Parts & Equipment.................................117
Wiring Diagram................................................118

CONSUMER INFORMATION ....................119

Authorized Manuals .........................................120
Contacting Honda.............................................121
Your Honda Dealer...........................................122
The Honda Rider’s Club (USA only) ..............123

TABLE OF CONTENTS ...............................124

INDEX .............................................................126

QUUICK REFERENCE

Table of Contents 125

Index
A C E
accessories ............................................................3 capacity, fuel.......................................................35 engine,
adjustments, carburetor, flooded...........................................................13
altitude and temperature................................90 adjustment .....................................................88 idle speed.......................................................91
carburetor ......................................................88 circuit functions.............................................88 number.........................................................106
chassis ...........................................................95 components ...................................................88 pinging...........................................................34
control freeplay ...................................42,44,57 disassembly/assembly ...................................92 starting...........................................................13
for competition..............................................71 high altitude adjustment..............................111 stop button.....................................................14
gearing...........................................................96 idle speed.......................................................91 stopping .........................................................14
high altitude carburetor ...............................111 maintenance...................................................92 won’t start......................................................13
personal fit.....................................................98 minor adjustments .........................................91 environment, protecting....................................102
suspension, front ...........................................72 care, appearance .................................................69 expansion chamber.............................................67
suspension, rear.............................................80 chain drive ..........................................................64
suspension, track conditions .........................84 chassis adjustments ............................................95 F
tire selection ..................................................97 choke knob .........................................................13 filter,
after competition maintenance ...........................26 cleaner, air ..........................................................40 air...................................................................40
air cleaner ...........................................................40 cleaning, appearance care...................................69 flooded engine, starting......................................13
air pressure, clutch system, adjustment ..................................44 fork,
front suspension ............................................72 competition logbook.........................................113 front suspension adjustment..........................72
tires................................................................62 consumer information ......................................119 front suspension inspection...........................52
American Honda, contacting............................121 contacting Honda .............................................121 oil recommendation.......................................54
appearance care ..................................................69 controls, operating................................................5 front brake lever adjustment...............................57
authorized manuals...........................................120 coolant ................................................................38 front suspension maintenance ............................72
customer service...............................................121 fuel,
B cylinder system...................................................47 line.................................................................35
basic operation ...................................................11 filter ...............................................................35
before riding .........................................................7 D recommendation............................................34
between motos & practice maintenance ...........26 damping adjustments, refueling ........................................................35
brakes, front ...............................................................78 system............................................................34
fluid level ......................................................58 rear.................................................................81 oxygenated ..................................................112
lever, front adjustment...................................57 dealer, your Honda ...........................................122 tank capacity .................................................35
pad wear ........................................................60 diagram, wiring ................................................118 valve ..............................................................13
pedal height ...................................................57 drive chain ..........................................................64
break-in guidelines .............................................16

126 Index
 Index
G M R
gap, sparkplug ....................................................46 maintenance, rear suspension maintenance..............................53
gasohol .............................................................112 additional procedures ....................................68 reed valve ...........................................................49
gasoline...............................................................34 after competition ...........................................27 Rider’s Club Honda..........................................123
gearing ................................................................96 before & after competition............................26 riding,
guidelines, suspension adjustment .....................85 between motos & practice.............................26 apparel .............................................................2
component locations .....................................28 basic operation ..............................................11
H general competition.......................................22 before...............................................................7
handlebar inspection...........................................68 importance.....................................................18 important safety information...........................2
high altitude carburetor adjustment..................111 safety .............................................................19 safety precautions..........................................12
Honda, schedule.........................................................20
contacting ....................................................121 manual, service.................................................120 S
Rider’s Club ................................................123 modifications ........................................................3 safety,
Service Manual ...........................................120 a few words about ..................Safety Messages
your dealer...................................................122 O important information .....................................2
oil, important precautions......................................2
I fork ................................................................54 labels ...............................................................4
identification, vehicle .......................................106 transmission...................................................36 maintenance...................................................19
idle speed, engine ...............................................91 operating, riding precautions..........................................12
inspection, pre-ride...............................................9 controls............................................................5 schedule, maintenance........................................20
instructions ....................................................11 serial numbers ..................................................106
L operation component locations ............................6 service,
labels, safety .........................................................4 optional, customer ......................................................121
logbook, competition........................................113 parts list .......................................................115 manuals .......................................................120
sprockets........................................................96 spare parts.........................................................117
oxygenated fuels...............................................112 spark knock ........................................................34
spark plug,
P maintenance...................................................46
pads, brake..........................................................60 reading...........................................................94
parts, optional ...................................................115 specifications .............................................107,108
personal fit adjustments......................................98 spring pre-load, rear suspension.........................80
pinging, engine ...................................................34 starting,
plug, spark ..........................................................46 engine ............................................................13
pre-load, rear suspension....................................80 troubleshooting............................................103
pre-ride inspection................................................9 steering stem inspection .....................................68
protective apparel .................................................2 stopping engine ..................................................14
storage ..............................................................101
subframe .............................................................32
suspension,
front ..........................................................52,72
rear............................................................53,80
(cont’d)

Index 127
Index
suspension adjustment,
front ...............................................................72
rear.................................................................80
for track conditions .......................................84
guidelines ......................................................85

T
transmission oil ..................................................36
tuning tips...........................................................88
throttle,
freeplay..........................................................42
inspection ......................................................43
tires,
air pressure ....................................................62
flat .................................................................62
selection.........................................................63
tools ..................................................................117
torque specifications..................................109,110
transporting.......................................................100
troubleshooting.................................................103
tubes, replacing ..................................................62

V
valve, fuel ...........................................................13
valve, reed ..........................................................49
vehicle identification no. (VIN) .......................106

W
washing your motorcycle ...................................69
wheels.................................................................61
wiring diagram .................................................118

128 Index
Memo 129
Quick Reference
The following is a brief, but important collection Record important information here:
of information you need to know about your VIN
Honda. You’ll also find space to record Engine No.
important notes.
Owner’s:
Name
How To Avoid Costly Repairs Address
City/State
The engine of your Honda can be the most Phone
expensive component to repair. Proper Dealer’s:
maintenance, especially the use of the
Name
recommended fluids and filters, prevents
premature wear and damage. Address
City/State
Frequent causes of costly engine repairs are: Phone
• Transmission oil & premix oil: insufficient Service Mgr.
quantity, improper oil.
• Air cleaner: dirty, leaking because of
improper installation (poor seal). Maintenance The maintenance schedule (page 21) lists service frequencies for:
each race or about 2.5 hours,
every 3 races or about 7.5 hours, and
every 9 races or about 22.5 hours
Pre-ride Inspection Check the items listed on the Pre-ride inspection checklist each time before you ride (page 9).
Fuel/Capacity unleaded gasoline, pump octane number of 91 or higher
Premix: Pro Honda HP2 2-stroke Oil (32 : 1)
Tank: 1.35 US gal (5.1 x)
Transmission oil Pro Honda GN4 4-stroke engine oil, or an equivalent.

Tires CR85R Front 70/100-17 40M Rear 90/100-14 49M

DUNLOP K490G DUNLOP K695
Type bias-ply, tube
CR85RB Front 70/100-19 42M Rear 90/100-16 52M
DUNLOP K490 DUNLOP K695
Type bias-ply, tube
Tire Pressure Front: 15 psi (100 kPa, 1.0kgf/cm2)
(cold) Rear: 15 psi (100 kPa, 1.0kgf/cm2)
Spark Plug BR10EG (NGK)
Coolant ethylene glycol antifreeze (silicate-free) for aluminum engines in 50/50 solution with Pro
Honda HP Coolant or equivalent distilled water.
Drive Chain RK420MSZ1

130 Quick Reference