Universal Parts Right Crankcase Cover - QMB139 Type 1

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.

Key Features

• Type 1 configuration: For matching QMB139 engines equipped with a 33-tooth oil-pump gear.
• Right-side replacement: Replaces the right crankcase cover, not the left CVT belt cover.
• Integrated filler neck: Incorporates the threaded oil-fill opening into the cover.
• Original-layout fit check: Compare the mounting holes, internal passages, and shaft opening to your existing cover.

Technical Specifications

• Brand: Universal Parts
• Part number: 151-78
• Part type: Right crankcase cover
• Configuration: Type 1
• Engine application: QMB139 / 139QMB, 50cc four-stroke
• Required oil-pump gear configuration: 33 teeth
• Features: Integrated threaded oil-filler neck, central shaft opening, and mounting holes

Compatibility

• 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.

• Type 1 right crankcase cover
• For compatible QMB139 / 139QMB 50cc four-stroke engines
• Requires 33-tooth oil-pump gear configuration
• Integrated threaded oil-filler neck
• Central shaft opening and mounting holes

Brand: Universal Parts; Part number: 151-78; Part type: Right crankcase cover; Configuration: Type 1; Engine: QMB139 / 139QMB 50cc four-stroke; Required oil-pump gear: 33 teeth; Features: Integrated threaded oil-filler neck, central shaft opening and mounting holes; Fitment: Match mounting pattern, passages, shaft opening and filler-neck position

Compatible QMB139 / 139QMB 50cc four-stroke scooter engines using a Type 1 right crankcase cover and 33-tooth oil-pump gear. Confirm gear tooth count, mounting pattern, internal passages, shaft opening and filler-neck position; engine code alone does not establish fit.