You-All 18mm CVK Carburetor w/ Accelerator Pump - PD18J

This 18mm CVK replacement carburetor fits all 139QMB powered 50cc scooters, including Chicago Scooter Co. (CSC), Honda Ruckus, and nearly every 50cc bike on the planet. This is THE go-to carburetor for any 50cc scooter and our #1 seller for good reason. .

Benefits:

1. A larger than stock venturi increases flow and fuel atomization.
2. A mechanical float-bowl accelerator pump helps prevent bogging and hesitation when accelerating quickly.
3. The black-top CVK dome and improved idle circuit deliver superior engine idle to prevent unstable idle surging and stalling found on many OEM 50cc carburetors.

Specifications:

• Brand: You-All
• Model: PD18J
• Type: CVK with Accelerator Pump
• Intake Bore: 18mm
• Outlet OD: 40mm
• Main Jet Size: 81 
• Idle Jet Size: 33

Compatibility:

This part is also compatible with scooters and ATVs with 139QMB-based 50cc / 80cc engines with the following engine codes:

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

This product is intended for off-road use only.

This product is not intended for use on public roads or land.

This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.

*Performance upgrades are considered racing parts and are not covered by warranty.