Polini 47mm 70cc Corsa Big Bore 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 Models70cc cast iron racing cylinder kit by Polini for scooters equipped with Kymco or Sym upright (GR1) engines. The cylinder has a 47mm bore and achieves an output of 11.7bhp at 9,000RPM according to manufacturer’s claims. **