50cc 4-Stroke GY6 139QMB Scooter Engine with Automatic CVT

50cc 4-Stroke GY6 139QMB gas scooter engine with automatic CVT transmission.

This complete engine includes electric starter, kick start, and CVT.

For use with scooters & vehicles with rear drum brakes. Brake shoes not included.

PLEASE NOTE:
There are many different versions of 50cc GY6 style 4-stroke engines used in the Chinese scooter market. Please be sure to check the detailed specifications and dimensions on our specifications page (tab titled "Specs") prior to ordering.

Please use these dimensions to verify that this engine will fit your scooter prior to ordering!

This scooter engine is designed for use with 10" diameter rear rims. This would correspond to a tire size of 2.75-10 through 3.50-10. Please be certain your rear tire falls within the range of these sizes. This engine will not accommodate rear tires that are larger than 3.50-10.

It is Monster Scooter Parts company policy that all engine sales are final. Our entire return policy can be viewed at the link below:

Monster Scooter Parts Return Policy

Style: Shortcase
Engine type: Single Cylinder 4-Stroke
Cooling: Air Cooled
Displacement: 49cc
Bore & Stroke(mm): 39 X 41.5
Max Power (kw/rpm): 2.3/7500
Max Torque (N-m/rpm): 3.2/6500
Min Unload Stable Rotation (rpm): 1600 +/- 100
Starting: Electric/kick

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