This is a complete bolt on kit designed for 6.5hp clones, hondas, and predator engines. The 24mm Mikuni Flatside will provide you with some serious bolt on power and will work with a huge variety of modifications, mod 2 cams all the way up to high lift, extremely modified engines. These kits are very easy to tune and dial in to your engine. Some jetting changes may be required. Works great with pump gas, non-ethanol and high octane fuel.