This cylinder kit fits most scooters with the 50cc GY6 engine. Includes almost all Chinese manufactured 50cc 4T scooters. Scooters such as the SYM Orbit CROX requires the lip of the engine casing to be machined with a dremel or die grinder to fit the larger skirting at the base of the cylinder into the engine casing. The installation of this kit increases the capacity of your engine from 50cc t0 80cc, and will produce significantly more power when tuned correctly. Main jet must be increased with the installation of this cylinder kit. We have a jet kit available to suit SYM and Kymco 50cc 4T models – to view click HERE
