1.Different specifications of piston ring could be supplied. 2.Competitive price and good quality. 3. ... coil, rectifier, switch key,relay6. Engine: cylinder, piston kit, piston ring, clutch kit, clutch disk&plate, clutch fiber, clutch housing,clutch ... : neck bearings, ball bearings.12. Gasket: block gasket, complete gasket, side gasket, top gasket.13. Others: air filters, silencer, timing adjuster ...