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Piston Kit 50mm For GY6 50cc 100cc Engine
Piston Kit 50mm For GY6 50cc 100cc Engine
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- The piston diameter:50mm/1.97".
- Replacement for GY6 50cc 100cc Cylinder assembly Pocket Bike Atv Quad Motocyle.
- High quality cylinder replacement part.High toughness,corrosion resistance,rustproof and durable，has a good heat dissipation structure design,providing reliable performance and long life service.
- Please check the model number,size,and picture before ordering to make sure this is the correct part.
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80cc upgrades to 50cc GY6 motors seem to get more attention than larger 100cc upgrades, but there are still a lot of 100cc kits out there. The larger kits put more stress on the motor than their smaller upgrades--in one motor I took apart, the 100cc piston was so wide that it started knocking against the inside of one of the engine cases on every downstroke, causing premature wear and tear on the piston and the crankshaft. Still, there's no denying the power that comes from extra displacement.This replacement piston kit is designed for 100cc big bore kits where the piston has suffered some damage (possibly from running too lean or from physical damage like that one that struck the engine case repeatedly). The kit includes the pistons, the rings, the connecting bearing for the crankshaft, and a fresh set of springs to hold everything together. The piston itself is a cast piston with nicely polished sides and a slightly nubbly finish for the top.I found this kit attractively priced for what it is--a smaller fix rather than a complete overhaul for a motor. My expectation is that it would work well in a properly sized (50mm) bore and would provide good performance. Note that you will need fresh head and barrel gaskets as well after changing the piston. You could try reusing what you have, but I doubt you'd have very good compression.Recommended.