This is a new GY6 150cc Scooter Carburetor Includes Electric Choke Inner Diameter (intake side): 24mm Outer Diameter (intake side): 32mm Inner Diameter (air filter side): 38mm Outer Diameter (air filter side): 42mm Fit Models: This Carburetor fits most makes and models of Scooters and Mopeds with 125cc – 150cc 4-stroke GY6 QMJ/QMI157, QMJ/QMI152 engine. (This is the most popular engine used in scooters.) Fits many models and makes of Scooters, ATVs, Mopeds and Go Karts. , Baja, Kazuma, Carroll Stream Eagle, Panterra, Kymco, Redcat Tank Giovanni Aimex Jackel Wildfire Xtreme Seaseng Qlink Yiben Jonway Jmstar, Vento, Tng. and Various unlisted makes/models. QMB139 50cc/49cc