This is the crankshaft that comes with the big bore kit.By reducing the rotating mass, it achieves excellent power and response in the high RPM range without sacrificing low-speed torque.Friction loss is also reduced by the incorporation of ultra high-speed precision bearings. ○H-Cross Section Connecting Rods ○Adoption of axe-shaped knife-edge crank web ○Crankshaft bearings pre-installed
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* If there may be an instruction manual included, it will be written in Japanese.
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