NCY 75cc Big Bore Cylinder Kit Upgrade for 50cc 2-Stroke Vertical A/C Honda, Kymco ScootersINCLUDES: Cylinder (50mm)Cylinder HeadPistonPiston RingsWrist Pin (12mm)GasketsCOMPATIBILITY: Honda – Elite SA50 2T, Dio SP-SR 50 2T, Dio ZX 50 2T, Shadow 50 2TDaelim – Cordi 50 2T A/C, Message 50 2T A/C, Tapo 50 2TKymco – Curio 50 2T, DJ 50 2T, Fever 50 2T, KB 50 2TSYM – DD 50 2T, Fiddle 50 2T, Flash/Free 50 2TOther Similar Models that use the VERTICAL engine**NOTE: Not legal for use in California on pollution controlled vehicles. Check local laws before installing.****