Save money 31 mm mounting hole distance Wide compatibility The carburetor mount/intake manifold fits 33cc, 49cc, & 52cc gas scooter engines The mounting holes on this manifold are 31 mm apart The carburetor mount/intake manifold fits 33cc, 49cc, 52cc gas scooter engines. The mounting holes on this manifold are 31 mm apart. This is a very common part used in the recreational and kid’s gas scooter world, and may be found on models from EVO, Motovox, X-Treme, and others.