200cc Yamaha 135LC Auto Clutch Project with 62mm Bore x 65.7mm Stroke by Haen, Indonesia

Stroked Up already - Cryogenic Treated crank, bearing, transmission 65.7 mm stroke (+3.5)

Another great mod from Bro Haen in Indonesia.

Check out the modification specs below:

– SKF Cryo Treated C4 Crank Bearing
– Faito Auto Clutch Crankshaft
– TKRJ Conrod
– Semi Close Ratio (Full)
– 22/18 Big Valve Head
– Cryogenic Valve Spring
– 62 mm HiSpeed R type piston
– 5 mm block gasket
– NGK Laser Iridium CR9EIA-9

62 mm Hi Speed R type piston - target compression 11 : 1

This is still a work in progress. Dyno tests will be posted soon by Bro Haen.


Co-founder of Bikes Republic and a motoring journalist by night. He is a self described enthusiasts with a passion for speed but instead rides a Harley and a J300. A man of contradictions, he is just as passionate about time off in the quiets as he is about trail braking into turn one at Sepang Circuit on two or four wheels.

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