Does your Chinese scooter have a broken belt? Dang it! You need to first determine if your scooter has a short case or a long case. Short case is the most common. if you have 10 inch wheels you have a short case and this belt will work. (If you have 12-13 inch wheels your scooter has a long case). One more thing to check. Look on the engine case and be sure your engine is a qmb139. This is the most common Chinese scooter engine. its a 4 stroke 49cc /50cc. The engine code is located on the left side. It is stamped right next to the center kickstand pivot point.