Naraku QMB139 Variator Kit
Naraku QMB139 Variator Kit
$90.53
5 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 Variator Kit
Key Details
- 137-42
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 | 1 lbs |
|---|---|
| Dimensions | 7 × 7 × 3 in |
Upgrade the CVT performance of your GY6 50cc 4-stroke scooter with the Naraku Performance Variator Kit. Designed for the QMB139 / 139QMB engine platform, this complete kit includes the CNC-machined, PTFE-coated variator drive face, coated movable face with red slider guides, 6 roller weights, bronze bushing, and steel boss sleeve — everything needed for a direct bolt-on variator replacement or performance upgrade.
Model Compatibility
- Genuine Buddy 50
- Genuine RoughHouse 50
- Honda Ruckus (NPS50)
- KYMCO Agility 50, Vitality 50, Filly 50
- SYM Mio 50
- QMB139 / 139QMB 50cc / 49cc 4-stroke engines (various makes)
Key Features
- PTFE-Coated Drive Face: Inner variator surface features PTFE coating to prevent galling, reduce friction, and extend belt and roller life.
- Complete Kit: PTFE-coated variator drive face, CNC movable face with red slider guides, 6 roller weights, bronze bushing, and steel boss sleeve.
- Movable Face: Black-coated aluminum with NARAKU PERFORMANCE engraving and red slider guides for smooth, consistent belt engagement.
- 88mm Outer Diameter: Correct sizing for QMB139 short-case 50cc CVT systems.
- 6g Roller Weights: 16x13mm rollers for an optimized CVT shift curve on stock and mildly tuned 50cc engines.
Technical Specifications
- Variator Outer Diameter: 88mm
- Drive Face Coating: PTFE (inner surface)
- Roller Weight Size: 16 x 13mm
- Roller Weight: 6 grams (set of 6)
- Includes: PTFE-coated variator drive face, movable face, 6 roller weights, bronze bushing, steel boss sleeve
- Engine: QMB139 / 139QMB 50cc 4-stroke
