Valve Cover Gasket for Scooters & Mopeds

Valve Cover Gasket for 50cc 4-Stroke Scooters and Mopeds

This valve cover gasket is built for 50cc 4-stroke engines, most notably the 139QMB. It helps keep the engine's sealing system intact, so oil stays where it belongs and leaks are kept in check. It belongs to the group of scooter cylinder heads & valves that contribute to smooth running and long engine life. If oil is seeping out or the engine is running poorly, swapping in a new gasket is a sensible fix to get your scooter or moped back in good shape.

Construction and Material

The gasket is molded from rubber, which gives a dependable seal on the engine. It sits snugly to stop oil from seeping out and supports overall engine condition. A tight seal matters for performance, and this gasket is made to handle regular everyday riding.

Installation Notes

Fitting a new valve cover gasket is a simple job for anyone with basic mechanical know-how. In general, you remove the old gasket, clean the mating surface thoroughly, and then set the new one in place. Positioning it correctly is what prevents leaks and lets the engine run efficiently.

Specifications

• Material: Rubber
• Fits: 50cc and 80cc 4-stroke 139QMB-based engines (139QMA, 139QMB and related codes)
• OEM Part Numbers: 139QMA, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD

Fitment

Fits:

• 139QMB-based 50cc 4-stroke engines (engine codes 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD)
• 139QMB-based 80cc 4-stroke engines
• Other QMA and QMB engines (engine code includes QM or FM)

How to choose: Compare the engine code stamped on your engine against the listed OEM part numbers, or confirm that the code includes QM or FM.

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