Two-stroke Exhaust Duration

EXHAUST DURATION
RPM DURATION
10,000 – 11,000 194 ° - 196
11,000 – 12,000 196 ° - 198 °
12,000 - 13,000 198 ° - 200 °
13,000 – 14,000 200 ° - 202 °
14,000 15,000 202 -204

EXHAUSTION DURATION FORMULA

T² + R² - L².
2 X R X T

LONG
STANG PISTON
EXHAUST DURATION = (180° - CO) X 2

T= R + L- E

R = STROKE DIVIDED BY 2

L = LENGTH OF PISTON ROD

E = HEIGHT OF EXHAUST HOLE FROM M.S.L

EXE : 1 YAMAHA F.1.ZR

 STROKE : 52mm HIGH EXHAUST : 26mm LONG

96mm
52 : 2 = 26mm
26²
2 X 26 X 96

D = (180° - COS )X2

D = ( 180° – COS O,135416666 ) X 2

D = (180° - 82.217) x 2

D = 97,782 X 2 = 195,565 → EXHAUST DURATION = 196° → 11,000 RPM

EXE : 2
52mm EXHAUST HEIGHT: 25mm ROD LENGTH: 96mm

52 :2 = 26mm T = 26 + 96 - 25 = 97mm

97² + 26² - 96².

2 X 26 X 97

D = ( 180° - COS )X2

D = ( 180° - COS O,172283901 ) X 2

D = ( 180° - 80.079 ) X 2
D = 99,921 X 2 = 199,842 → EXHAUST DURATION = 200° → 13,000 RPM
EXHAUST PIPE

ED X 42545.
R P M

L=
 L = IDEAL EXHAUST PIPE LENGTH. (from PISTON to the midpoint of CONE
SPEAKER ).

ED = Exhaust Duration

RPM = Engine revolutions at Exhaust Duration

EXE: 1 26mm 11.000

196 X 42545.
11,000

L= = 758mm

EXE : 2 25 mm RPM : 13000

200 x 42545.
13,000

L= = 654.5 mm

* HEADER
Ø Port in exhaust: 100cc → 140cc 34mm to 40mm
140cc → 175cc 40mm → 46mm

Header length: 7.8 → 8.8 x Ø Port exhaust

Header angle: 1° → 2° max (road race). 2° → 3° max (motocross)

FLANK The distance between the piston and the header: 60mm - 80mm

DIFFUSER Diffuser Angle: 6.5 ° → 7.5 °

4.5 ° ; 7.5 °
Stage 3 = 4.5° ; 7.5° ; 9° → 10°

BELLY
Ø Belly 2 → 3 X Ø Port exhaust Long belly = L – ( Header + Diffuser + ½ Baffle )

SPEAKER Speaker 9° - 12°

STINGER PIPE LENGTH IN THE PIPE

125cc – 145cc ------ 150mm – 265mm 19mm - 23mm

145cc – 175cc ------ 150mm – 320mm 22mm - 27mm

Read the Colors on the 2-Stroke Cylinder

READING COLOR ON A 2-STROKE CYLINDER

1 Clean shiny brown/black Normal

2 Chocolate / black with a crust in squiz Excess oil mixture

Main jet of greatness
Final gear objection
RPM is not high enough

3 White crusted chocolate on squiz Final gear reduction

The main jet is too small

Altitude RPM

4 Shiny clean black Main jet of greatness

Type the cold bus

5 Black crusted flat Excess oil mixture

The right side of the crank is broken.

The ventilation is not very good.

6 Cloudy milk chocolate Fuel mixed with water

7 Bright white and shiny The main jet is too small.

 8 Bluish white on the dome Type bus is hot
Pilot jet is too small
Compression of grandeur

Ignition timing is too early

The silencer magnet is damaged.

Over rpm / engine brake

READ THE DAMAGE ON THE PISTON

1 Edge piston broken/decayed/melted Angle squiz

mistake
Ignition timing is too early
Height compression
Stang piston is damaged

Claern piston & block

grandeur

2 The piston center is dented / holed Main jet is too small

Type of bus overheating
Compression of greatness

Ignition timing too early

3 The hole on the porting side is even. Incorrect oil mixture
The clear piston is not big enough.

Piston is not fully matured

Over head

4 Leak next to the piston Corteran on clynd block

miring
Bent piston rod

5 Leak on the exhaust side Over rpm / engine brake

Final reduction of gear
Leaking exhaust

6 Damage in the gap between the piston ring The corteran clynd block is uneven.
The gap ring piston is too small
Super Kips Ninja modification
Super Kips Modification

Super KIPS (Super Integrated Power Valve System) on the Kawasaki Ninja RR is like a Variable Timing Valve on a 4- engine
That advanced mobile. The difference is that Super KIPS is responsible for opening and closing the waste hole. The function of Super KIPS can be maximized.

by outsmarting the violence per governor's valve opening lever. So without a machine lighter, the machine character can change,
just choose whether you want the nice feeling below or the powerful one in the upper spin.

Consists of a series of centrifugal balls and a ring. On the standard Ninja RR, the centrifugal ball will be fully thrown at

7,000 rpm.

The ball's crushing, pressing the Super KIPS foot and rod opens an additional hole, just like how an automatic clutch works on

the motorcycle when we step on the gear. Well, if you want to change the character, just insert a ring with an outer diameter

28mm, inner diameter 15mm and thickness 1mm in the circuit before the spring, similar to shimming the valve spring.

The result is pressing harder. The centrifugal ball shift is quickly responded to. The Super KIPS also opens quickly, suitable for

high RPM machine. If it's still not enough, just add a few rings to make Super KIPS open at a lower rpm.

If the ring is placed after the spring, the effect is reversed. The displacement of the ball is only slight,

the Super KIPS opening result is postponed.

Dear...
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 Advertisement Installation

We are opening an offer for cheap advertisement installation on our website, www.korekmesin.com, I can help
market your products and business to meet your market share.
www.korekmesin.com is one of the top sites for modifying motorcycles in Indonesia
so it can be ensured that every visitor to our site can access your ads.

MOVE FORWARD NATIONAL RACING WORLD

motorcycle pump
The racing world will never stop, apart from being sponsored by manufacturers, it is also sponsored by spare part factories, everyone is competing.

to get the best value from society. When it comes to interest, many individuals are interested in diving in.
directly, both for professionals and beginners. And the tire.whoever is dedicated to focus on this business, opportunities
Motor racing is still very open, now it's your turn. This is a struggle to be the best.
to conquer the motorcycle, yourself, and others who will eventually consider you the maestro of racing.
always keep the motorcycle key for our descendants.

MOTOR REPAIRS ARE VERY EASY IF YOU KNOW

Not too late

It's never too late to learn,,,,, it's the same for us who want to or have already plunged into the world.
racing/motor racing,,,there are still many opportunities available...this is real and proven, as long as we never
desperate. Therefore, you created a Machine Torch guide to serve as a reference for mechanics.
homeland
MOTOR RACING SALAM

Super Kips Ninja

Tips to avoid Super KIPS traffic jams
Many KIPS super valve incidents in the Euro 2 generation Kawasaki Ninja can jam. If it jams, acceleration and top-
speed drops immediately. "Stuck due to a pile of exhaust residue. So the rotation is hindered. But, no need to
replaced. Just clean it like cylinder head service," said Freddyanto Basuki, head of the service division at PT Kawasaki Motor.

Indonesia (KMI).

Essentially, the Super KIPS valve is designed to increase power. It opens after the engine revs up to 7,000 rpm. At lower rpm,

the motor acceleration is good because the Super KIPS valve closes. Thus, the exhaust hole opening is not large. And, at high rpm.

its speed is fast. This is because the KIPS valve opens an additional exhaust port. As a result, the exhaust gas flows more smoothly and quickly.

Super KIPS is also used to meet Euro 2 exhaust gas emission standards. Therefore, if Super KIPS is jammed, all its objectives are not achieved.

road,” explained Freddy, the greeting of Freddyanto Basuki. He also provided an easy way if Super KIPS is congested.

Just open the Super KIPS cover rubber in front of the cylinder head. To check it, rev the gas up to 7,000 rpm. If the gears of Super

KIPS does not move, indicating that this component is stuck. "Ideally, at 6,000 rpm the Super KIPS gears should start to move and open.
full after 7,000 rpm," explained Freddy again.

If you find out there's a traffic jam, hurry up and fix it. You can do it yourself. Prepare a plus screwdriver, a 10 and 8 ring wrench, and a 5 L wrench.

Start by opening the side fairing using a plus screwdriver. Next, remove the Super KIPS protective rubber.

SKIPS Valve Operator Child

Then remove the Super KIPS valve actuator shaft. Use a 10mm wrench (fig. 1). Be careful, the nut opens differently than a common bolt.

Instead of turning to the right, tighten by turning to the left. Before releasing the knob, pay attention to the part

Above it, there is a dot. When installed later, this dot must be in the middle of the 2 dots that are on the Super KIPS gear (fig. 2).

SKIPS Valve Turner

Continue to remove the Super KIPS house. Unscrew both locking bolts with a 8mm ring wrench (fig. 3). To open it normally, turn to the left.

Now the Super KIPS valve is visible. Before removing it, pay attention to the teeth of both valves. There is 1 dot on each tooth. When installing.

Later, the two points must meet.

Locking bolt

If you understand, remove the two valve locking bolts using a 5mm L-key. To pull out the valve, you must help pry it out with a flathead screwdriver.

Choose the position of the jack that does not damage the surface of the cylinder head.

After successfully being removed, clean the part coated with orange Teflon. If there is carburetor cleaner, it can be used.
Spray it first to soften the crust. If not available, just scrape it with fine sandpaper size 1,000 to avoid scratching.

iron valve.

After finishing. Please reinstall it back to the original position.

Dear...
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Your satisfaction with the motorcycle engine starter is our pride.
WE OFFER CHEAP AD INSTALLATIONS
Advertisement Installation

We are offering cheap advertising installation on our website, www.korekmesin.com, I can help.
marketing your products and business to meet your market share.
www.korekmesin.com is one of the top sites for modifying motorcycles in Indonesia
so it can be ensured that every visitorour site can access your ads.
ADVANCE CONTINUOUSLY NATIONAL RACING WORLD

motorbike
The racing world will never stop, in addition to being sponsored by manufacturers, it is also sponsored by spare parts factories, everyone is competing.

to achieve the best value from the community. When it comes to interest, many individuals are interested in diving in.
directly, both for professionals and beginners. And the tiresWhat also dives into focusing on this business, opportunities
The motorcycle racing automotive scene is still very open, now it's your turn. This is the struggle to be the best.
to conquer the motorcycle, yourself, and others who will eventually consider you the racing maestro.
always keep the motorcycle engine lighter for our children and grandchildren.

FIXING A MOTORCYCLE IS VERY EASY IF YOU KNOW

Not too late

There is no such thing as too late to learn,,,, it is also the same for us who want to or have already dived into the world

racing/motor racing,,,there are still many opportunities open...this is real and proven, as long as we never
despair. Therefore, you create a Machine Injector guide to serve as a reference for mechanics.
motherland
MOTOR RACING SALAM

Korek Satria FU 150 Daily MANTABBZZZZZZ

Many say that in the harsh world of illegal street racing, the engine capacity must be big or extra fat.
creating a power increase that makes the engine run wild, power wants to scream continuously as the gas is pulled.

But if you want to use it for daily, this is one of the modification tricks for the Satria FU 150 engine that can be good for racing, or just showing off.

stylis jg can.
The Suzuki Satria engine with a capacity of 150cc is the result of the marriage of a piston diameter of 62mm and a stroke of 48.8mm with

this 10.4 compression comparison needs to be revised if you really intend to become the king of the streets.
The first thing to do is... make a budget. Prepare the money first! Because if there's no money, how can you modify...

I consider the money to be in hand. Next, we will change the machine specifications to a stroke of 61.8mm as a result of the stroke.

The upgraded standard has a step of 6.5mm and a piston of 65mm from the Hispeed brand, which already has a valve cutout for 4 valves.

If calculated, the capacity of the machine becomes:

V = 0.785 x 65 x 65 x 61.8 = 204.9cc

Well, this capacity is enough to do official drag in the 4-stroke moped class up to 200cc, drag now, go home can be
take it to the market, heeee

Don't forget that this 6.5mm raised stroke requires a 4.5mm thick aluminum lower block packing. Then the piston in
make a dome with a height of only 1mm and then trim the head by 0.5mm.
Talking about the head surely includes discussing the valves as well... Just go ahead and hit the standard valve (23-19) with a 25 intake and 21.

exhaust. If there are any difficulties in this section, feel free to contact me for assistance and orders.

Then don't forget to modify the camshaft to have a lift of 7.8mm with a duration of 280 intake and 276 exhaust.
The next step, still around the head, don't forget to port in and ex to make it circular, as the standard is oval...

Porting with an intake diameter of 28mm and an exhaust of 27mm.

For the valve springs, just use the standard ones because they are still strong enough. The issue is the power transfer, also known as the clutch and spring.

the clutch can be replaced with a racing product.. It will definitely be good..
Make sure the magnet is subjected to a 1.5mm circular lathe so that it is light and supports acceleration later. Here are the problems.

carburetor. Here, just use the NSR SP carburetor with a diameter of 28mm, don't use a bigger carburetor, or it will be difficult to find a rival...

Setting pilot jet 42 and main jet 125. Wind turns 1.5 turns. Then for ignition, just leave it to the rextor CDI.
– can be adjustable or programmable – settings from 15 degrees to 38 degrees at 9000 rpm. The limiter is set at
just 14000 rpm while for the gear ratio or transmission just use the standard, no problem.

Dear...
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HELLO BIKERS

Machine socket
Tegoeh Chuzy : 087840585278 / 085726163659

We Always Try to Provide the Best and Quality Reviews to Meet

Your Satisfaction With Motorcycle Engine Oil, Your Satisfaction Is Our Pride.
WE OFFER CHEAP ADVERTISING INSTALLATION
Advertisement Installation

We are opening an offer for cheap advertisement installation on our website, www.korekmesin.com, I will help.
promoting your products and business to meet your market share.
 www.korekmesin.com is one of the top sites for motorcycle modification in Indonesia
so that it can be ensured that every visitor to our site can access your ads.

GO FORWARD NATIONAL RACING WORLD

motorbike pump
The racing world will never stop, not only sponsored by manufacturers but also by spare parts factories, everyone is competing.
to achieve the best value from the community. In terms of interest, many individuals are interested in diving in.
Directly, both for professionals and beginners. And the tire.what also plunges to focus on this business, opportunities
Motor racing is still very open, now it's your turn. This is the struggle to be the best.
to conquer the motorcycle, yourself, and others who will eventually consider you the racing maestro.
keep the engine matches for our children and grandchildren,,,,

REPAIRING A MOTORCYCLE IS VERY EASY IF YOU KNOW

Not too late

There is no such thing as too late to learn,,, it is the same for those of us who want to or have already dived into the world.

racing/motor racing,,,there are still many opportunities available...this is real and proven, as long as we never
desperate. Therefore, you made a Guide to Engine Boring to serve as a reference for mechanics.
homeland
MOTOR RACING SALAM

Valve Work

It's time to discuss the treatment of the new valve. Especially on the part of the valve umbrella lip. It needs to be made with two angles.

tiered. The lowest angle is 45 degrees and the top is 30 degrees (fig. 1). The purpose is to ensure a smoother flow of the exhaust gas.

able to increase engine power.

the two stepped angles must also be balanced on the seat or valve seating. "So that the valve can close tightly
and compression no leak, if leak all so free, to complain, g shameful.

More details on the manufacture of valve seats, the inner diameter of the valve seat must also be made with a multi-angle seat. Its level.

namely 75°, 60°, 45 degrees and 30 degrees (fig. 2)

From that level, it can be guessed. Later, a 45-degree angle.othe edge of the valve umbrella will meet at an angle of 45 degrees0 from sitting valve. So

so just don't take too long to lap the valves,

The inner diameter surface of the sitting valve must also be made with a radius. The size of the radius is 10-12% of the diameter.

Clip. For more clarity, please refer to the image (img. 3).

Most importantly, for the flow of exhaust gas to run smoothly, it must be

pay attention to the large diameter of the sitting valve. "According to the theory it is 88

up to 90% of the diameter of the valve umbrella," said the brother who

longing for that kind-hearted life partner.

Misal klep isap TK 28 mm that is widely used by mechanics for

baby 4-stroke 125 cc. Just multiply by 28 x 88% = 24.6 mm. If

To be bigger, just calculate from 28 x 90% = 25.2 mm.

It is also necessary to pay attention to the outer diameter when making valve seats, which depends on the diameter of the valve and the area of the space.

bakar. For example, use a valve with a diameter of 28 mm. The inner diameter of the valve seat is 24.6 mm and the outer diameter is 30 mm.

One more thing to pay attention to is the height of the sitting valve. "To withstand impacts, the height should be 5-6 mm. The material used

cast iron or albronch,

ALBRONCH AND COPPER

Making seat valves, many machinists already know. 'The best material is aluminum. Besides being soft, it is also impact-resistant.
For the valve boss material, Wok chose copper. It has smooth properties but is resistant to friction.
Noken As / Cam (FACTORY) According to Setting
To test the power and AFR of the Camshaft? The manufacturer can use
dynotest brand dynojet 250i owned by PT Trimentari Niaga Cibinong, if used
the standard only produces 9.80 hp. If you are going to use a Noken
As a racing manufacturer, we also have to consider many things such as
the purpose of working on a motorcycle for daily use or racing, road racing or drag, and even grass
track. To be clearer, let's look at the test results.

Kawahara

The K2 product from Kawahara is the mid-range option from the Kawahara manufacturer. K1
intended for daily use and K2 for those who are faster. Above K2 actually
There is still K3, or what can be called Racing Only (RO). The RO testing does not
It is carried out because it requires very high specifications, there is a concern that a collision may occur.
enter the cleat and discard the piston.

The results of this test show a very large power.

maximum power 12.6 dk at 8,200 rpm. but at lower revs 7,800 rpm
Still filling up the Marathon. Kawahara is indeed great at above 7,800 rpm.

MARATHON

Noken As / Kem Marathon is indeed still playing it safe. There is no need to fear something happening.
Collision between the intake and exhaust valves and the piston. Has duration, lift, and power.
OK. Creating power of 12.56 dk at 8,200 rpm. Compared to K2, Marathon is indeed
lower revs. Above 8,200 rpm still smokes the Kawahara K2. Kawahara still
should be prioritized

HRP
Noken As / Kem HRP by Hendriyansyah Racing Products has a character like Mbut
and suitable for daily use. Power is around 11 hp at 8,200 rpm. Looking at the AFR curve,
Using standard carburetor and nozzle on HRP is very suitable. The curve line plays in AFR.
13: 1. This figure is very safe for racing,,,,the combustion chamber safety is guaranteed

TDR
Noken As TDR is tested with a small valve and wide pay, the TDR cam produces power.
Compared to the standard cam, using the TDR cam increases power by 1.2.
To further enhance it, there are other types of TDR available that are widely used.
Only TDR Racing (RO).

Noken As / Racing Manufacturer

Noken As / Racing Manufacturer

Many mechanics only buy ready-made racing camshafts directly from

manufacturers, this is usually due to lack of research, insufficient knowledge of Camshafts, fear of failure, and
saving costs. Many brands of racing camshafts are circulating in
society. Many different options, even one brand also offers choices-
different choices as well.

Therefore, we try to provide information that can help you.

understanding the choices in selecting the appropriate Camshaft / Pulley
your motorcycle character.

Examples of factory racing camshafts:

KAWAHARA
There are three types type K1

type K2

type K3
For K1 and K2, they are usually used for daily racing, lift, overlap, and LSA is not too much.
extreme. Currently for K3 for Extreme racing.

KAWAHARA DATA K1

Clamp in(duration): 16+180+47 = 237 degrees

Klep ex(rurasi): 53+180+13 = 239 degrees

Lif in 8 mm

Lift ex 8 mm

LSA 98 degrees

Price 350 thousand

KAWAHARA K2 DATA
 Klep (duration): 11+180+57 = 248 degrees

Klep ex(rurasi): 41+180+31 = 252 degrees

Lif in 8.75 mm

Lift ex 8.56 mm

LSA 103 degrees

Price 400 thousand

Kawahara Racing Data Only

Klep in(duration): 28 + 180 + 60 = 268 degrees

Klep ex(rurasi): 60+180+31 = 252 degrees

Lif in 10.33 mm

Lift ex 8.89 mm

LSA 113 degrees

Price 600 thousand

TDR
Noken As / TDR racing camshaft is indeed suitable for daily use and racing, duration and
LSA is very safe in overlapping so that there is no collision between the valves. Even
for a wide valve even.

DATA Noken As / TDR Camp

Klep in(duration): 13+180+45 = 238 degrees

Klep ex(rurasi): 41+180+22 = 243 degrees

Life in 8.4 mm

Lift ex 7.93 mm

LSA 94.5 degrees

Price thousand

MARATHON
Noken As / Camshaft product from Mitra2000 sells very well in the market.

DATA Noken As / Kem New Marathon

 Total duration: 16+180+50 = 246 degrees

Klep ex(rurasi): 41+180+9 = 230 degrees

Lif in 7.78 mm

Lift ex 7.53 mm

LSA 112.5 degrees

Price 250 thousand

NEW CLD
Almost similar to a marathon, even better at boosting power than
marathon. CLD stands for Ciledud or Champion Leader Development. Kem
or this camshaft is harder or equal to the standard factory camshaft.
Angle in (duration): 17 + 180 + 48 = 245 degrees

Klep ex(rurasi): 49+180+13 = 242 degrees

Lif in 7.82 mm

Lift ex 7.82 mm

LSA 105 degrees

Price 400 thousand

HRP
HRP (Hendriyansyah Racing Products) made by a national racer leader.
Hendriyansyah. The duration of this camp is similar to the CLD camp, which has a smooth character.
for daily use. Nice for short tracks

Klep in(duration): 18+180+43 = 238 degrees

Lock ex(rural) : 49+180+13 = 252 degrees

Lif in 7.35 mm

Lift ex 7.33 mm

LSA 102 degrees

Price 300 thousand

Shape and Code of racing magnet
some suitable ignitions for you, special second-hand engine from a motorcycle
YZ125, KX125, RM80, etc.. for your DRAG, Ba-Li, or Grass Track needs...

full set of ignition

KX125
YZ125 4SS Yamaha Garputala logo
RM80 / RM85

4SS OEM Japan Yamaha Garputala logo

Example CDI 4SS

Example Coil 4SS

Example Spool 4SS

Example Magnet 4SS

Intake YZ125 bends to the left 34MM-38MM (For RX king, RX-Z, Touch125)
Tips for working on a Simple Racing Motorcycle
TRICKS IN RACE CAR ENGINE
It is not unusual for a racing bike to be full of tricks. A smart way to find the weaknesses of the opponent's bike.
Moreover, the regulations for illegal street racing are vague, just like official racing. All motorcycles can rev up to the max... and brake hard...

The important thing is that the type of motorcycle is the same or still within the same variant. Besides that, the appearance of the motorcycle must be predominantly standard. But

This race does not rule out the possibility of competing with different variants and depends on the agreement.

That's why, to be able to compete with similar or different variant motorcycles, Bontot performed a trick that can be considered phenomenal.

The official drag motor tuner has successfully modified the Honda Supra X 100 to have 6 speeds or 2 gears more than
the standard. Fantastic.
Why is it fantastic? Because most mechanics can only make this modification up to the 5-speed or higher stage.
1 gear. Meanwhile, the engine with a pure cylinder capacity of 97 cc can still add 2 more gears. What about the crankcase?

and cylinder. Is the change extreme?

Bontot admitted that the Supra X has indeed undergone many changes. According to him, where

There might be an addition of gearbox gears but not balanced with an enlargement in the crankcase space. Where else to place 2 gears?

additional ratio.
This time the change is not just about rearranging the hole for the second gear shaft's handle ratio. But with the arrangement of gears.

a larger and longer ratio, then the engine compartment is enlarged by adding a 3 mm thick aluminum packing.
between the center block.

The automatic thick gasket that expands the engine compartment makes it easier for Bontot to arrange each comparison.

Gigi. Starting from gear 1 to 6, results from each brand are then arranged inside the gearbox that is not

I want to mention the brand.

Basically, everything uses a lighter gear ratio. It starts from the primary-secondary gears with a ratio of (17/67).
Then the ratio for tooth one is (14/47), tooth two (17/33), tooth three (24/28), tooth four (25/24), tooth five (23/26), and tooth six (25/25)," added the mechanic who
started his career as a drag bike racer.
Then, as a counterbalance to the changes in the gearbox, Bontot also readjusted the position of the clutch stud rod to make it a bit shorter.

Due to the clutch housing moving closer to the engine block.

And besides adjusting the position of the engine mounting bolts on the frame, he also said that the right crankcase is damaged.
from the Chinese motorcycle (Mona). Because the oil pump is integrated, meaning it is not separated like the one from Supra X which has a pump rod.

the line crosses the piston rod hole.

It is possible to fill it with a 6-speed gear. And the advantage is that after the gearbox space is spacious, the cylinder volume can be bored up larger.

again and not just stuck using Kawak Kaze piston.

This means that currently it uses the block cylinder and head of a Yamaha Jupiter-Z. Meanwhile, the piston is from an oversize Tiger 2000.

200 diameter 65.5mm in the piston rod of the Kawasaki ZX130. Stroke increased by 5 mm after adopting the crankshaft of the Honda Karisma.

Only the position of the machine handle bolts needs to be adjusted, especially the 4 threaded holes. And the most shifted is
the distance of the bolt to the top. Because it is not blocked by packing like the middle block," continued Bontot while explaining that the Tiger piston foot.

It needs to be cut so it doesn't hit the piston rod.

YZ 125 ignition
Who is Tid

Firing Racing YZ-125 Full set

Consists of: I am interested in this ignition, the full ignition set from the Garputala manufacturer is proven to be very effective.

In terms of ignition, MANTABZZZZ, the ignition from the YZ 125 is still considered very suitable for all types of racing.

Darg, road race or grass track, this ignition SET is still the champion compared to other products, there's nothing wrong with that.

Try to retrain your iron horse with this Yamaha product.

Magnet
Spool
CDI
Coil
body cable

Very suitable for those who love racing.

Can be applied to almost all duck and sport motorcycles.

Price around Rp 3,900,000
4SS Coil Price Rp 425,000
Picture:

EXHAUST CALCULATION FORMULA

Tuned EXHAUST VALVE OPEN DEGREE BEFORE B.D.C
RPM

50° 55° 60° 65° 70° 75° 80° 85° 90°

8,000 21.5 21.9 22.5 23.0 23.6 24.1 24.6 25.2 25.8
8.500 20.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5 24.0
9,000 18.7 19.2 19.6 20.1 20.6 21.1 21.5 22.0 22.5
9,500 17.6 18.0 18.4 18.9 19.4 19.8 20.2 20.7 21.2
10.00016.5 16.9 17.4 17.8 18.3 18.6 19.119.620.0
10.50015.6 16.0 16.4 16.8 17.2 17.6 18.018.418.8
11.00014.8 15.1 15.5 15.9 16.3 16.7 17.017.417.8
11.50014.0 14.3 14.7 15.1 15.5 15.8 16.2 16.6 17.0
12.00013.3 13.6 14.0 14.3 14.7 15.0 15.4 15.8 16.1
P = 850 X ED -3
RPM
ID = √CC______ X 2.1
(P+3)X 25
IDS = √ID² × 2 × 0.93

P = HEADER LENGTH ( INCH ) RPM = MAXIMUM ENGINE REVOLUTION

ED = EXHAUST DURATION = 180° + EXHAUST VALVE OPENING SBTMB

ID = Ø IN PIPE P = LENGTH OF HEADER PIPE ( INCH )

Ø PIPE HEADER MINIMUM SAME Ø VALVE EXHAUST

IDS = Ø IN THE SECONDARY PIPE

EXE : EX CLOSE: 80° SB.TMB 11,000 110cc

17.0” / 431.8mm

110 .
( 17.0 + 3 ) X 25

ID 110 X 25
17.0 + 3 X 25
0.98 inches / 24.89 mm
IDS = ( 0.98X2 ) X 0.93
1.28 inches / 32.7 mm