Naraku QMB139 Adjustable Drive Sheave
Naraku QMB139 Adjustable Drive Sheave
$117.09
1 in stock
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
Orders placed by 1pm EST on weekdays ship the same day.
Product Details
Description
Naraku QMB139 Adjustable Drive Sheave
Key Details
- NK900.53
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: QMB139
- Engine Code: QMB139
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 QMB139 engine?
A: This SKU is listed as compatible with QMB139 engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for QMB139 scooters?
A: This SKU is listed with QMB139 engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.9 lbs |
|---|---|
| Dimensions | 6.5 × 6.5 × 2.5 in |
With more linear slots, Naraku's Adjustable Drive Sheave (torque driver, secondary slider) improves acceleration and top speed in bikes with 50cc 139QMB engines.
Specifications:
- Overall Outer Diameter: 118.7mm
- Inner Diameter: 33.5mm
- Includes rear pulley, bearings, and nut
NOTE: If installing on a CSC go, you'll need these clutch slider pins
| CSC Bella Classic 50 | CSC go |
| CSC go MAX | CSC Nitro Sport 50 |
| CSC Pug 50 | Â |
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 Naraku: NARAKU is a professional supplier of motorcycle parts from Taiwan. We’ve sold various motorcycle parts, scooter parts and accessories for more than 10 years. Our quality products are sold to Europe, Asia and America. We supply engine parts and accessories for modern scooters and mopeds. With our advanced technologies and the superb quality of our products, we can offer everything your ride needs.
