50cc 4T Complete Engine, CSC go., QMB139 Scooters

50cc 4-Stroke GY6 139QMB gas scooter engine with automatic CVT transmission.Our complete GY6 engine includes electric starter, kick start, and CVT.This engine is for use with scooters with rear drum brakes. Sorry, brake shoes are not included.PLEASE NOTE:There are many different versions of 50cc GY6 style 4-stroke engines used in the Chinese scooter market. This scooter engine is designed specifically for use with 10" diameter rear rims. This corresponds to a tire size of 2.75-10 through 3.50-10. Please be sure your rear tire diameter falls within the range of these sizes.Style: ShortcaseEngine type: Single Cylinder 4-StrokeCooling: Air CooledDisplacement: 49ccBore & Stroke(mm): 39 X 41.5Max Power (kw/rpm): 2.3/7500Max Torque (N-m/rpm): 3.2/6500Min Unload Stable Rotation (rpm): 1600 +/- 100Starting: Electric/kickPlease choose carefully! Scooterworks now has a firm no return policy on engines, barring manufacture defects or shipping damage.Product is intended as OEM equivalent for listed models.Any misuse, alteration or alternative application is prohibited by law.