This 19mm CVK replacement carburetor fits all 139QMB Chinese engines. Fitted with an 85 main jet, it's better than stock and boasts a larger venturi and an accelerator pump, which will frequently eliminate hesitation when you open her up.

Original Parts For Scooters SKU 151-29

Benefits:

• A larger than stock venturi increases flow and fuel atomization.
• A mechanical float-bowl accelerator pump helps prevent bogging and hesitation when accelerating quickly.

Specifications:

• Electric choke (plug style): 2-pin, male
• Accelerator pump
• Remote float bowl
• Venturi: 19mm
• Airbox side: ID 29mm, OD 38mm
• Engine side: ID 19mm, OD 28mm
• Jetting-Main: 85 (4mm thread PB)
• Jetting-Pilot: 35 (6mm thread CV)
• Needle: Non-adjustable GY50 A4
• Compatible jets-Main: JETKH1, Pilot: CV style, Idle: #34
  

Compatibility: 

Don't see your engine listed? If the engine code includes "QM" or "FM" this part is compatible with your vehicle.

About Blue Line: About Blue Line: Blue Line offers OEM equivalent replacement parts for on-road scooters. Blue Line parts are a direct-fit replacement when OEM parts are unavailable or overly expensive for your scooter. Since 2018, Blue Line has provided quality parts at great prices.