This Universal Parts right crankcase cover is a Type 1 replacement for compatible 50cc four-stroke QMB139 engines using a 33-tooth oil-pump gear. It gives you a replacement for a cracked or damaged cover while retaining the matching engine layout, with an integrated oil-filler neck, central crankshaft opening, and mounting points.
Features
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Type 1 configuration: For matching QMB139 engines equipped with a 33-tooth oil-pump gear.
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Right-side replacement: Replaces the right crankcase cover, not the left CVT belt cover.
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Integrated filler neck: Incorporates the threaded oil-fill opening into the cover.
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Original-layout fit check: Compare the mounting holes, internal passages, and shaft opening to your existing cover.
Specifications
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Brand: Universal Parts
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Part number: 151-78
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Part type: Right crankcase cover
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Configuration: Type 1
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Engine application: QMB139 / 139QMB, 50cc four-stroke
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Required oil-pump gear configuration: 33 teeth
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Features: Integrated threaded oil-filler neck, central shaft opening, and mounting holes
Model Fitment
- Compatible QMB139 / 139QMB 50cc four-stroke engines using the Type 1 cover and a 33-tooth oil-pump gear
Confirm your oil-pump gear has 33 teeth and compare the cover's mounting pattern, internal passages, shaft opening, and filler-neck position before ordering. Engine code alone does not establish fit. The 33-tooth specification identifies the required engine configuration; this listing is for the cover, not an oil-pump gear.
