Adds about 1-2hp and amplified torque about stock carb and it is fuel mixture adjustable. The 22mm is the appropriate decision If you're jogging stock valves This is exactly why our engine experts are there for you each move of the best way from order, installation, and any specialized concerns https://augustmfwlz.blogkoo.com/an-unbiased-view-of-go-kart-parts-near-me-cheap-54418282