Premium GY6 50cc (139QMB) Short Gasket Set

GY6 50cc Short Gasket Set for QMB139 Engines

This short gasket set is made for the GY6 50cc QMB139 engine and helps create a tight seal at the scooter's covers and cylinders. Its job is to keep oil, fuel, and compression where they belong, which supports steady engine performance. It is one of the key GY6 50cc scooter parts, and it should be swapped out any time the engine is opened or a leak appears. Pick from 39mm, 50mm, or 52mm bore sizes to suit your engine.

When to Replace It

Gaskets and oil seals are essential for stopping leaks and keeping the engine running efficiently. Swap them out as soon as you see signs of wear, or whenever you take the engine apart, so that further damage is avoided and performance stays consistent.

Specifications

• Size: 39mm, 50mm, 52mm bore options
• Position: Short-case CVT
• Fits: GY6 QMB139 50cc 4-stroke engines with short-case CVT, in 39mm, 50mm or 52mm bore

Fitment

Fits:

• GY6 QMB139 50cc 4-stroke engine (short-case CVT, 39mm bore)
• GY6 QMB139 50cc 4-stroke engine (short-case CVT, 50mm bore)
• GY6 QMB139 50cc 4-stroke engine (short-case CVT, 52mm bore)
• Various unlisted makes and models with QMB139 short-case CVT engine

How to choose: Find the bore that matches your cylinder, either 39mm, 50mm, or 52mm, as marked on the cylinder or listed for your engine. This listing covers only the short-case CVT version.

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