16mm 49cc to 125cc carburetors most commonly used for (and not limited to) 2-stroke pocket bikes, 4-stroke mini-choppers, mini dirt bikes and mini quads (ATVs). Also used for various other 49cc 2-stroke as well as 50-125cc 4 stroke machines. This carb has a 16mm manifold opening, 30mm breather opening and 48mm center to center bolt mount. Works on 80cc Yamaha Beluga scooters.