Chinese 50cc 139QMB Complete Engine Gasket Set
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Complete 139QMB Engine Gasket Set
Eliminate leaks and restore engine compression with the Universal Parts Complete 50cc Engine Gasket Set. Whether you are performing a top-end refresh or a full crankcase split, this comprehensive kit provides every seal and gasket required to properly close up a 50cc 4-stroke engine. Designed to meet or exceed OEM specifications, these gaskets are manufactured from high-density materials that resist the heat and chemical breakdown common in air-cooled scooter engines.
Comprehensive Component List
- Engine Case Gaskets: Includes the center crankcase and stator/magneto cover gaskets.
- Top-End Seals: Features the cylinder head gasket, base gasket, and valve cover seal.
- CVT & Transmission: Includes a high-quality CVT cover gasket tailored for your specific case length.
- Exhaust & Intake: Comes with a crush-style exhaust gasket and the intake manifold spacer O-ring.
Sizing Guide & Selection
QMB139 engines come in multiple configurations.
Please use the Drop-Down Menus above to select the correct size for your build:
| Bore Size (Head Gasket) | Recommended For |
|---|---|
| 44mm | Stock 50cc Engines |
| 48mm | 72cc / 80cc Big Bore Kits |
| Case Type (CVT Gasket) | Measurement Details |
|---|---|
| Short Case (SC) | 15 11/16" (398mm) Length | 8-Bolt Pattern |
| Long Case (LC) | 17" (432mm) Length | 11-Bolt Pattern |
Installation Tip: Always ensure the engine mating surfaces are scraped perfectly clean and free of old gasket material before installing the new set.
Vendor: Universal Parts
Engine Type: GY6 50cc 4-Stroke (QMB139 / 1P39QMB)
Shipping information
Orders are prepared as quickly as possible. Delivery times and shipping costs are calculated at checkout based on the destination and items ordered.
Returns & warranty
Please verify fitment and part number before ordering. Contact Thrifty Scooters promptly if an item arrives damaged or incorrect.