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Piranha 140cc Pit Bike Engine
55mm Stroker Crankshaft Kit
we recommend the following:
Race Head V2 Intake Kit
Trail Bikes 108cc Stroker Kit 3 with Race Head for CRF50 Finishing Touches Piranha 140cc Pit Bike EngineThis kit is the complete kit to convert your stock motor into a powerful open class 108cc engine (much more powerful than the common Chinese 107 and 125cc engines). Also this crank was made specifically for the newer engines and thus you will not have any fitment issues like trimming the piston skirts in order to clear the crank or the piston not lining up with the cylinder deck. 51mm Crankshaft with NTN bearings High compression piston with rings,
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