HURI 47mm Cylinder with Piston Head Bottom Gasket Pulley Chain Tensioner Roller for Motorized Bicycle Bike 80cc 2 Stroke Engine Replacement parts,non original Fit motorized bicycle bike 80cc 2 stroke engine Package include 1pc cylinder + 1pc piston kit + 1pc piston needle +1pc pulley chain tensioner roller + 1pc head gasket + 1pc bottom gasket + 1pc HURI pocket tape Note:you could apply for a full refund if you didn't receive HURI branded pocket tape.