Universal Parts
Universal Parts 139QMB Transmission Bearing & Seal Kit
Description
This Universal Parts transmission bearing and seal kit brings the replacement bearings, oil seals and gearbox gasket together for your compatible 49cc/50cc 139QMB transmission rebuild. Refresh worn gearbox components and restore smooth, reliable power delivery without hunting down each part separately.
Key Features
- Convenient rebuild kit: Six bearings, two oil seals and one gearbox gasket.
- 139QMB application: For compatible 49cc/50cc scooter gearboxes, also referred to as QMB139.
- Matched service components: Includes the bearing references and seal sizes below.
- Gearbox sealing: Replacement oil seals and cover gasket support a thorough gearbox service.
Technical Specifications
- Brand: Universal Parts.
- Part number: 151-285.
- Part type: Transmission bearing and seal kit.
- Engine application: 139QMB / QMB139, 49cc/50cc.
- Country of origin: Taiwan.
Kit Contents
| Component | Reference / size | Quantity |
|---|---|---|
| Bearing | 6303 | 1 |
| Bearing | 6203 | 1 |
| Bearing | 6004 RS | 1 |
| Bearing | 6201 | 3 |
| Oil seal | 17 × 30 × 6mm | 1 |
| Oil seal | 27 × 42 × 7mm | 1 |
| Gearbox gasket | Matching gearbox cover | 1 |
Compatibility
Fits compatible 49cc/50cc 139QMB / QMB139 engines and other models using the matching QMB139-style transmission. Compare bearing references, seal dimensions and the gearbox gasket profile with your original components before installation.
Product Diagrams
Features
Specifications
Brand: Universal Parts; Part number: 151-285; Application: compatible 139QMB/QMB139 49cc/50cc transmissions; Bearings: 6303 x1, 6203 x1, 6004 RS x1, 6201 x3; Oil seals: 17x30x6mm x1, 27x42x7mm x1; Gearbox gasket: x1; Country of origin: Taiwan
Model Fitments
Compatible 139QMB/QMB139 49cc/50cc engines and models with matching QMB139-style transmissions; compare bearing references, seal dimensions and gearbox gasket profile.
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
