GY6 2 Port Fuel Valve (UNEF "Extra Fine" Threads)
ITEM# TT-17215
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Description
GY6 2 Port Fuel Valve for 50cc 139QMB Bikes
This two-port fuel valve works as a drop-in substitute for the factory petcock on 50cc 139QMB scooters. Its UNEF extra fine threads allow it to seat accurately. Keeping fuel moving correctly through the scooter depends on this component. It is among the GY6 scooter parts that owners commonly swap out to keep the machine running well.
Build and Layout
The valve has a zinc plated finish. A plastic filter, 63.5 mm long, sits inside to help keep fuel free of particles. The black oil seal measures 8mm across the inner diameter and 14.5mm across the outer diameter, which helps create a tight seal against leaks.
Signs It Needs Replacing
Fuel dripping or fuel flow that comes and goes are good reasons to swap the valve. Checking it routinely can catch problems early, before they hurt how your scooter runs. This piece plays a real role in keeping the fuel system working efficiently.
Specifications
- Material: Zinc Plated
- Thread Size: M16X1.0 (Extra Fine Threads)
- Plastic Filter Length: 63.5 mm
- Black Oil Seal Dimensions: 8mm ID x 14.5mm OD
- Fits: GY6 50cc and 80cc 139QMB-based 2-stroke engines (engine codes listed)
Compatibility
Fits:
- GY6 50cc 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD engines
- GY6 other QMA and QMB engines (engine code includes "QM" or "FM")
How to choose: Match the thread size on your old petcock: M16x1.0 (extra fine threads).
Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Fuel System Parts · Scooter Parts
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