GY6 50cc (139QMB) Bolts (M7*168, Pair)
ITEM# TT-26716
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Description
Replacement Bolts for GY6 50cc and 80cc Engines
These two bolts are meant to take the place of the original studs on scooters that use 139QMB engines. A snug, reliable fit is the main goal here, which is why they matter for keeping the engine assembly intact. They belong to the GY6 50cc scooter parts range and contribute to how your vehicle runs. If you are repairing or swapping out engine components, these are worth a look.
Construction and Fit
Each bolt is cut to exact measurements so it installs correctly. The overall length is 168mm, which lets it seat securely within the engine. The small end uses an M7x1.00 thread over a 14mm thread length, and the large end also uses an M7x1.00 thread, but with an 18mm thread length.
When to Replace
Swap these bolts out if the engine starts to vibrate or if you notice they are worn. Bolts in good condition help the engine stay steady. Checking them regularly can help you avoid damage to other engine parts.
Specifications
- Overall Length: 168mm (6.5 inches)
- Thread Size (Small End): M7x1.00
- Thread Length (Small End): 14mm
- Thread Size (Large End): M7x1.00
- Thread Length (Large End): 18mm
- Fits: 139QMB-based 50cc and 80cc engines (139QMA, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB)
Fitment
Fits:
- 139QMB-based 50cc and 80cc engines (engine codes 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD)
- Other QMA and QMB engines (engine code includes QM or FM)
How to choose: Compare the engine code stamped on your engine with the list above. Any code that contains QM or FM is considered compatible.
Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Bolts, Screws & Hardware · Scooter Parts
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