cylinder kit 150cc 57.4mm for China 4-stroke GY6 125 152QMI, 150 157QMJ

150cc Cylinder kit for all 125/150cc 4 stroke Chinese scooters which use the GY6 157QMI or 152QMI engines.
Can be used as a direct replacement for 150cc engines as standard or a performance upgrade to 125cc engines. If fitting to a 125cc scooter then necessary up jetting will be required (approx 10%).

Kit is supplied with required top end gaskets, barrel, piston, rings, pin and clips.

Please note: If purchasing this kit for the Sym 125cc scooters, please ensure your engine is the GY6 version (cylinder head stud holes have a distance of 63mm hole to hole, outside to outside measurement).