For Dinamo Chopper 250cc Current 6 speeds Cylinder Barrel Piston Gasket KitCylinder Piston Gasket Top End Rebuild Kit 65. 5mm For Dinamo R1 R2 Chopper Scorpion 250cc 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 which