56mm 140cc Cylinder Piston Kit 13mm For Pit Bike Apollo RXF MRF RMT YX140 YX14956mm Cylinder Piston Gasket Top End Rebuild Kit For Pit Bike Dirt Bike YX 140cc Engine 1P56FMJ Features: If your cylinder blows through, the compression is too low, or even a piston seizure has occurred, then this kit is exactly the right thing for you. Kit includes cylinder, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured). The cylinder is made of aluminum for good cooling with an internal cast iron jacket (unlike