Airsal 50cc sports cylinder kit with all necessary parts e.g.: gasket set, piston, piston rings etc. (includes cylinder head). Same timing as the M-Racing kit, and with 2-part outlet. Piston is designed for lower compression ratio, and only has one piston ring. Aluminium with hard chromed liner. This Airsal 50cc sports cylinder is somewhat better than the original cylinder, and offers a slight performance increase. Note: Can be used with original exhaust and carburettor will need up jetting. 2bhp added power.