GY6 50cc (139QMB) Cylinder Head
ITEM# TT-26721
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Description
GY6 50cc Cylinder Head for 139QMB Motors
This head is built to swap in for original parts on scooters running 139QMB motors. It offers dependable operation for your scooter. Owners frequently pick it during routine service or when upgrading. It belongs to the range of GY6 50cc scooter parts that support steady engine output and day-to-day function.
Engine Code Match
This head suits 50cc and 80cc motors built on the 139QMB platform. It is listed for engine codes such as 139QMA, YN139QMB, and BN139QMB. If your engine code includes "QM" or "FM," this part should fit your scooter.
Fitting Tips
Swapping the head is simple for anyone comfortable with scooter upkeep. Take care to line it up correctly during fitting so the engine keeps running as it should. Check whether other pieces, like gaskets and valve assemblies, also need replacing so the job is complete.
Specs
- Bore: 39mm
- Exhaust Bolt Hole Spacing: 49.75mm
- Intake Bolt Hole Spacing: 44.75mm
- OEM Part Number: 1100-1331 (gasket), 1100-1328 (valve assembly)
- Fits: 139QMB-based 50cc and 80cc GY6 engines (139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2)
Fitment
Fits:
- GY6 50cc engines with code 139QMB, 139QMA, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB
- GY6 80cc engines with code 147QMD and other QMA/QMB models
- Any engine with a code containing "QM" or "FM"
How to choose: Compare your engine code with the list, or confirm it contains "QM" or "FM"; the head requires a 39mm bore and 44.75mm intake and 49.75mm exhaust bolt spacing.
Browse further: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Parts
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