Complete 72cc Iron cylinder & head kit!!! This works with Chinese 50cc 4-stroke 139QMB engines with 69mm valves like Znen, Kymco, Wolf, Scoot Star, and some newer Tao Taos.
Pump up that weak engine to a respectable 72cc displacement, on a budget. This kit is not indended to make your scoot a screaming race-machine. It is intended to get you that extra power you need. (Most Chinese 50cc's only put down around 1.5hp to the ground.)
Increase the reliability & power of your scoot today!
NOTE:
Remove your valve from your scooter's head and meaure the full length of the valve stem. If your scooter has 64mm valves, you'll need the following 64mm big bore kit.
