Race Head, 88cc Big Bore kit, and 20mm Carburetor Performance Kit
Race Head has been updated for even more performance! It now has 25/22mm valves with better porting/flow. We also kept the combustion chamber the same size and changed the angle of the valves slightly. This will really wake up your stock engine and is comparable in power to the much larger Chinese 124cc engines!!!
Includes the following:
The exhaust valve has been upgraded to stainless steel (21-4N material)
We recommend purchasing a high volume oil pump kit (available below in related items)
Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).