You-All 18mm CVK PD18J Carburetor | 139QMB Ruckus
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Eliminate hesitation and restore consistent power to your 50cc scooter with the You-All 18mm CVK PD18J carburetor — our #1 selling carburetor. Larger venturi with a mechanical accelerator pump for crisp throttle response and a stable idle on daily commuters and performance builds alike.
- Model: PD18J (CVK type)
- Intake bore: 18mm
- Air filter mount OD: 40mm
- Main jet: #81
- Idle jet: #33
Compatible Models (139QMB / GY6 50cc):
- Chicago Scooter Co.: go., go. Max, Bella 50, Nitro Sport
- Wolf Brand: RX-50, Islander, Rugby, Blaze, Lucky, Jet
- Lance: Cali Classic 50, Cabo 50, PCH 50
- Honda: Ruckus / Metropolitan (select 50cc carb models)
- All 139QMB / GY6-powered 50cc scooters, ATVs, and quads with PD18J carburetors
Mechanic's notes: After installation, ensure your throttle cable has a small amount of freeplay so the accelerator pump can fully reset between throttle inputs.
Off-road use only. Not intended for use on public roads or land.
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