Product Details
Description
Blue Line Pulley and Clutch Assembly; 139QMB
Key Details
- Original Parts For Scooters SKU: 151-232
Compatibility
Fits many 139QMB-based 50cc / 80cc scooter engines. Confirm measurements, connector style, and engine family before ordering.
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, 80cc
- Engine Code: 139QMB
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a 139QMB engine?
A: This SKU is listed as compatible with 139QMB engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for 50cc scooters?
A: This SKU is listed with 50cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 4.512 lbs |
|---|---|
| Dimensions | 5 × 5 × 3 in |
| Condition | New |
|---|
Blue Line's complete driven pulley and clutch assembly fits Genuine Buddy and Rattler scooters, CSC go, Bella, Nitro Sport, Pug, and other 139QMB bikes. See the compatibility table below to ensure this product works with your ride.
Original Parts For Scooters SKU 151-232
- Rear Pulley Assembly with Clutch
- Rear Clutch Drum Bell with 22-tooth splines
- Outer Diameter: 115mm
- Inner Diameter: 11mm
| Genuine Buddy 50 | Genuine Rattler 50 |
| Chicago Scooter Company go. | Chicago Scooter Company Go. Max |
| Chicago Scooter Company Bella | Chicago Scooter Company Pug |
| Chicago Scooter Company Nitro |
139QMB-based 50cc / 80cc engines with the following engine codes:
| 139QMA | 139QMB | 1P39QMB | 1P39QMA-2 |
| YN139QMB | JJ1P39QMB | 139FMA-2 | BD1P39QMB |
| BN139QMB | 147QMD | Other QMA models | Other QMB models |
Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle.
About Blue Line: Blue Line provides OEM-equivalent replacement components for on-road scooters. Blue Line parts serve as direct-fit alternatives when original equipment manufacturer parts are poor quality, unavailable, or prohibitively priced. Since 2018, Blue Line has been delivering high-quality scooter parts at competitive prices, ensuring optimal value for customers.





