Brand new 49cc cylinder kit (uses a 44mm diameter piston, 10mm wrist pin) for 2-stroke stand up gas scooter motors. Fits 2-stroke 49cc chopper, Cateye 49cc pocket bike, X7 2-stroke pocket bike, X1, X2 pocket bike (49cc)
404-3-2, 815-4-3
Overall Height (piston): 40mm
if your have a 43cc motor, with a piston diameter that is 40mm, this cylinder kit will still work.
it will just act as big bore kit, bumping your 43cc motor (40mm) into a 49cc motor (44mm).