Cylinder Bore: 40mm. For Yamaha Y-Zinger 50 1981-. For Yamaha Pee Wee PW50 1990-. Cylinder: 4J2-11311-01-00, 4J2-11311-00-00. Cylinder Head: 4J2-11111-01-00. Warranty is not transferable. Replica Model: GTMOTOR G50T, Loncin PY50, LX50PY, Jianshe PY50.
