A great carburetor for 4-stroke 40cc engines.. Whether you are looking to replace a damaged or missing carburetor, or you are looking for a "greener" more efficient fuel system, then look no further than our carburetor for the X-PRO 40cc mini bike to provide the performance you want as well as dependability.. Engine intake inner diameter: 11 mm. Air intake inner diameter: 15 mm. Used on dirt bikes, ATVs, mini bikes, and trail bikes..
