GY6 Cylinder Rebuild Kits Trkimal Upgrade 50mm Big Bore Kit Cylinder head assemble 69mm valve sets for 49CC 50CC 139QMB Moped Scooter Engine, Racing Performance CDI Ignition Coil Spark Plug Clutch etc
- This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed..
- With cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug.
- Upgrades parts kits for most of 50cc scooter.