The crankshaft is the beating heart of your engine block and converts the piston movement into a rotating motion.
A worn crankshaft causes play, vibrations, and bearing noise. A good crankshaft with tight bearings ensures a smooth, reliable running engine.
This part is suitable for the China 4-stroke GY6 and China 4-stroke QMB (12mm).
Always replace the crankshaft bearings and seals during assembly for the best result.
