Product Details
Description
Naraku QMB139 Super Transmission Kit is a variable product with selectable options. Choose the correct option before adding to cart.
Product Details
ScootsUSA offers the best naraku qmb139 super transmission kit at great prices. Explore our catalog for top-quality parts and fast shipping! Naraku Super Transmission Kit for 50cc QMB139 engines. Kit includes: Variator, Variator Drive Face, Belt, Torque Spring Base, Clutch and Clutch Bell. Choose from either belt length 669mm or 788mm in the drop down menu. The 669mm length belt is for short case engines that use a 10" rear wheel. The 729mm belt is for long case engines with 12" rear wheel. The 788mm length belt is for extra long case engines, like are found on the Maddog 50cc Ruckus clone. Please see our Warranty & Returns Policy. Roller Weight Size: 16x13mm (6g) Variator Outer Diameter: 88mm Clutch Drum Number of Splines: 22 Clutch Drum Spline Inner Diameter (peak to peak): 11.10mm Sliding Torque Spring Base Outer Diameter: 118mm Drive Face Number of Splines: 26 Drive Face Spline Inner Diameter (peak to peak): 13mm Drive Face Outer Diameter: 113.7mm SUPPORTED MODELS: QMB139 50cc/49cc , Various unlisted makes/models
Ordering Notes
Use the dropdown options on this product page to select the correct version, color, size, or fitment before ordering.
Additional information
| Weight | 8 lbs |
|---|---|
| Dimensions | 13 × 10 × 8 in |
| Size | 669, 729, 788 |
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 49cc, 50cc, QMB139, Ruckus
- Engine Code: QMB139
- Fits Models / Common Applications: Honda Ruckus and other compatible models may apply.
- Fitment Notes: Long Case, Short Case, Clone / Chinese
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: Will this fit a Honda Ruckus?
A: This SKU is listed with Honda Ruckus model fitment where the scooter also matches the listed engine or fitment notes.
Q: Is this for 49cc scooters?
A: This SKU is listed with 49cc engine-size fitment. Confirm exact model, year, and part style before ordering.
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: Will this fit a Honda Ruckus?
A: This SKU is listed with Honda Ruckus model fitment where the scooter also matches the listed engine or fitment notes.
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 | 8 lbs |
|---|---|
| Dimensions | 13 × 10 × 8 in |
| Size | 669, 729, 788 |





