Blue 1000rpm UP For light tuning Components: Center spring
*It is possible to install on the Yamaha 50/80/90/100 vehicles before the exhaust gas regulation. *Some vehicles may not be able to be installed after the regulation.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
Even though it is a 4-stroke, it can accelerate as fast as a 2-stroke. To do this, you need Torque Camshaft, Reinforced Winner Spring, etc. Please do not use Single Body in NORMAL. The drivetrain will hurt faster.View Detail
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