GY6 50cc (139QMB) Honda Ruckus You-All 18mm CVK PD18J Carburetor

GY6 50cc (139QMB) Honda Ruckus You-All 18mm CVK PD18J Carburetor. The carburetor mixes fuel and air for your engine; jets and needles fine-tune that mixture. Built to fit GY6, GY6 50cc (139QMB), Honda Ruckus. Shop more GY6 50cc Scooter Parts (139QMB) and Scooter Carburetors & Jets.

Hard starting, bogging, surging or poor idle often point to a dirty or worn carburetor. Match the carburetor size (for example PD24J or 18mm) and intake fitment, and re-jet after adding a performance exhaust or air filter.

Product details

Restore consistent power and throttle response on a compatible 50cc scooter with the You-All 18mm CVK PD18J carburetor. Its mechanical accelerator pump helps reduce hesitation during throttle transitions, while the 18 mm venturi supports steady airflow for daily riding and performance builds.

Key features

• PD18J CVK-style carburetor
• Mechanical accelerator pump for crisp throttle response
• 18 mm intake bore
• Pre-installed #81 main jet and #33 idle jet
• 40 mm air-filter mount outside diameter
• Direct replacement for compatible 139QMB/GY6 50cc engines

Specifications

• Model: PD18J
• Type: CVK carburetor
• Intake bore: 18 mm
• Air-filter mount outside diameter: 40 mm
• Main jet: #81
• Idle jet: #33

Compatibility

• Chicago Scooter Co.: go., go. Max, Bella 50, Nitro Sport
• Wolf: RX-50, Islander, Rugby, Blaze, Lucky, Jet
• Lance: Cali Classic 50, Cabo 50, PCH 50
• Honda: Ruckus and Metropolitan, select 50cc carbureted models
• Universal: 139QMB/GY6 50cc scooters, ATVs, and quads using a compatible PD18J carburetor

Mechanic's note: After installation, leave a small amount of throttle-cable freeplay so the accelerator pump can fully reset between throttle inputs. Verify the carburetor model, intake dimensions, and cable/choke setup before ordering.

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.

Specifications

• Fits: GY6, GY6 50cc (139QMB), Honda Ruckus
• Part type: Carburetors & Jets
• Measurement: 18mm
• Engine size: 50cc
• Condition: New

Fitment check

Compare this part with your original before ordering: match the size, connector or part number, and the position on your scooter. Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm.

Shop more: GY6 50cc Scooter Parts (139QMB) · Scooter Carburetors & Jets · GY6 Scooter Parts · Scooter Parts