GY6 50cc (139QMB) 20mm Carburetor Diaphragm

20mm Carburetor Diaphragm for GY6 50cc Engines

This diaphragm is made for 20mm black top carburetors used on GY6 50cc engines. It helps the engine get the right blend of fuel and air, which is important for smooth running. It is one of the GY6 50cc scooter parts that can help with problems such as difficult starting and rough idling. Swapping out a worn or dirty diaphragm can bring back your scooter's throttle response and efficiency.

What This Part Does

This diaphragm controls the air-fuel mixture inside the carburetor. Bogging or surging can point to a diaphragm that needs replacing. Keeping this part in good condition can help avoid engine performance problems.

Specifications

• Outer Diameter of Slide: 17.9mm
• Outer Diameter of Rubber: 52.5mm
• Fits: GY6 50cc (QMB139) 20mm black top carburetors, various unlisted makes and models

Fitment

Compatible with:

• GY6 50cc QMB139 engines, 20mm black top carburetor
• Various unlisted makes and models with a 20mm black top carburetor

How to choose: Before installing, confirm that the carburetor's slide outer diameter is 17.9mm and the rubber outer diameter is 52.5mm.

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