Product Details
Description
Blue Line CVT Drive Belt 669 18 30; 139QMB, GY6 50
Key Details
- Original Parts For Scooters SKU: 106-147, SKU 151-32
Specifications
- Length: 669mmnTop Width: 18mmnGroove Angle: 30°n SUPPORTED MODELS: Universal Fit
- Width: 18mmnGroove Angle: 30°n SUPPORTED MODELS: Universal Fit
Compatibility
Fits many 139QMB-based 50cc / 80cc scooter engines. Confirm measurements, connector style, and engine family before ordering.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, 80cc, GY6
- Engine Code: 139QMB
- Fitment Notes: CVT, Universal Fit, Auto Transmission
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 | 0.45 lbs |
|---|---|
| Dimensions | 8 × 4 × 2 in |
| Size | 669x18x30 |
| Condition | New |
|---|
Replace a worn or snapped CVT drive belt on your 139QMB 50cc 4-stroke scooter with this Blue Line 669-18-30 aramid-reinforced belt. The tooth surface is covered in durable nylon fabric to reduce noise and improve transmission efficiency, backed by a high-strength chloroprene rubber core and robust aramid cord layers for outstanding heat dissipation and wear resistance. Fits most 139QMB short-case 50cc engines with 10-inch wheels.
- Aramid cord reinforcement for exceptional strength and heat resistance
- Nylon tooth surface fabric — reduces noise, improves efficiency
- High-strength chloroprene rubber core
- Fits 139QMB / 139QMA short-case 50cc 4-stroke engines
- Compatible with CSC go, go MAX, Pug 50, Nitro Sport 50, Bella Classic 50 and many other popular import models
- SKU: 1200-1187
- Belt Size: 669-18-30
- Belt Circumference: 669mm
- Belt Width: 18mm
- Drive Face Angle: 30°
- Construction: Aramid cord, chloroprene rubber, nylon tooth fabric
- Country of Origin: China
| Brand | Models |
|---|---|
| CSC (Chicago Scooter Co.) | go, go MAX, Pug 50, Nitro Sport 50, Bella Classic 50 |
| 139QMB / 139QMA Engines | All 49/50cc short-case 4-stroke scooters with 10" wheels |
Compatible Engine Codes
| 139QMB-Based 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 code? If the engine is a 4-stroke 49/50cc, has a 10" wheel, and the engine code includes "QM" or "FM", this belt is highly likely to be compatible with your vehicle.





