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
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Engine Case Gaskets: Includes the center crankcase and stator/magneto cover gaskets.
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Top-End Seals: Features the cylinder head gasket, base gasket, and valve cover seal.
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CVT & Transmission: Includes a high-quality CVT cover gasket tailored for your specific case length.
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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)
