Polini 47mm Big Bore 70cc Cylinder Kit Upgrade for 50cc 2-Stroke A/C Honda, Kymco ScootersINCLUDES: Cylinder Block (47mm Cast Iron, Short Threaded)Cylinder HeadPistonPiston RingsWrist Pin (12mm)GasketsCOMPATIBILITY: BSV – GP-SP 50 2T, ZX 50 2THonda – Dio SP-SR 50 2T, Dio ZX 50 2T, Shadow 50 2TDaelim – E-Five 50 2T A/C, S-Five 50 2T A/CHSC – SC 01 50 2TKymco – CX-CX Super 50 2T, DY World 50 2T, DJY 50 2T, K 12 50 2TSYM – DD 50 2T, Fiddle 50 2T, Flash/Free 50 2TOther Similar ModelsPolini has produced this reliable cast-iron 70cc sport cylinder kit for everyday use. The 70cc sport cylinder will work with the original carburetor although the main jet should be increased by approximately 8-10%. You can expect power output of up to 9 HP. Because of the 70cc sport cylinder’s massive bottom end punch, it makes it a wheely addict’s premier choice. The 70cc sport cylinder kit comes with gaskets, piston and cylinder-head. **