Scooterworks USA, LLC

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

SKU 1100-1251
Shipping calculated at checkout.
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.

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: 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

Please 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.

  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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