GOOFOUND 50CC GY6 Carburetor Kit for 49cc–50cc Scooters — 139QMB/139QMA Compatible, #78 Jet & Electric Choke

GOOFOUND's High-Performance 50CC GY6 Carburetor is a complete replacement carburetor kit for 49cc–50cc 4-stroke scooters and mopeds, compatible with 139QMB/139QMA engines and including an intake manifold for straightforward installation.

This carburetor kit from GOOFOUND is built to restore reliable starting, smoother idling and better throttle response on popular Chinese-made scooters and small ATVs. Designed around a #78 main jet and an electric choke, the unit targets an improved fuel-to-air mix for 49cc–50cc GY6 platforms. The kit arrives with essential hardware—intake manifold, spark plug, fuel filter and gaskets—so you can replace the old carburetor and get back on the road quickly.

Will this carburetor fit my 49cc or 50cc scooter?

Yes, the GOOFOUND 50CC GY6 carburetor is made for many Chinese GY6-style engines, specifically the 139QMB and 139QMA families. Confirming fit before purchase prevents returns and installation delays.

• Compatible engine types: 139QMB and 139QMA (GY6 series)
• Intake inner diameter: 18 mm; outer diameter: 40 mm
• Typical fit: most 49cc–50cc scooters and mopeds that use GY6-style carburetors
• Check: compare mounting flange and vacuum/fuel line positions to your existing carburetor

How does this carburetor improve engine performance?

The unit uses an upgraded #78 main jet and a factory-fitted two-pin electric choke to help achieve a more consistent fuel-to-air ratio across common riding conditions. That combination supports easier cold starts, steadier idling and cleaner throttle transitions without extensive tuning.

• #78 main jet pre-set for balanced fuel delivery
• Built-in 2-pin electric choke for reliable cold starts
• Factory calibration reduces immediate re-jetting in most installs
• Includes fuel filter to protect the circuit from debris

What comes in the package and what do I need for installation?

The GOOFOUND kit includes the carburetor, an intake manifold to match GY6 mounting, a spark plug, a fuel filter and two gaskets so you have the main parts required to swap a worn unit. Basic hand tools and simple prep steps will get the job done for mechanically-inclined owners.

• Included: 1x 50cc GY6 carburetor, 1x intake manifold, 1x spark plug, 1x fuel filter, 2x gaskets
• Tools: screwdriver set, pliers, socket wrench, small container for fuel
• Prep tip: photograph current setup and label lines before removal
• Time: expect an hour for a straightforward swap; more if cleaning or additional adjustments needed

How easy is installation and what support does GOOFOUND offer?

GOOFOUND designed this part for a plug-and-play replacement on compatible scooters, with clear hardware included to minimize extra purchases. If fit questions or installation issues arise, the brand offers customer support by email to assist with model confirmation and troubleshooting.

• Plug-and-play design for many GY6 49cc–50cc models
• Manufacturer guidance: email support available for fit and setup questions
• Recommended practice: photograph and label vacuum/fuel lines before disassembly
• Minor tuning may be required for altitude or modified engines

Who is this for: Riders and small-vehicle DIYers who own 49cc–50cc scooters or mopeds with GY6-style 139QMB/139QMA engines and need a reliable replacement carburetor kit. It suits owners replacing a tired or clogged carburetor who want a near-complete parts kit—intake manifold, spark plug, fuel filter and gaskets—to finish the job without sourcing multiple components. If you ride in high-altitude areas or have a heavily modified engine, expect to perform minor tuning after installation.