Cylinder Kit 150Cc Gy27396Cylinder Kit 150cc 57. 4mm for China 4 stroke GY6 125 152QMI, 150 157QMJ150cc 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