Naraku Performance QMB139 & Piaggio Torque Spring Base
Naraku Performance QMB139 & Piaggio Torque Spring Base
$61.31
6 in stock
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
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Product Details
Description
Naraku Performance Torque Spring Base: QMB139/Piaggio
Key Details
- NK900.44
Specifications
- Height: 30mm Includes base, ball bearings, and bearing race Does not include spring! Performance springs are available online High-temp grease should be used on the ball bearings Compatibility: 50cc 139QMB engines, including Aprilia, Honda, Piaggio, Derbi, Kymco and those noted below139QMB-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.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, 80cc, QMB139
- Engine Code: 1P39QMA, 1P39QMB, QMB139, 139QMB, BN139QMB, YN139QMB
- Fits Models / Common Applications: Kymco and Piaggio and other compatible models may apply.
- Fitment Notes: Performance
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 1P39QMA engine?
A: This SKU is listed as compatible with 1P39QMA engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Will this fit a Kymco?
A: This SKU is listed with Kymco 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 | 0.55 lbs |
|---|---|
| Dimensions | 3 × 3 × 4 in |
| Condition | New |
|---|
Eliminate Spring Bind: Naraku Ball-Bearing Torque Spring Base
Optimize your CVT's shifting consistency with the Naraku Performance Torque Spring Base. This precision-engineered upgrade replaces the static factory spring seat with a high-performance ball-bearing assembly. By allowing the torque spring to pivot and twist freely as it compresses, this base eliminates "spring bind," resulting in smoother downshifting and more predictable acceleration out of corners.
Technical Performance Features
- Anti-Binding Ball Bearing System: Utilizes a captured bearing race that allows the spring to rotate independently of the pulley, reducing friction and internal stress.
- Improved Shift Response: By removing mechanical resistance, the rear pulley can react faster to throttle changes, keeping your engine in its optimal powerband.
- Universal 50cc Fitment: Specifically designed for the 139QMB engine platform and Piaggio/Gilera 50cc 2-stroke and 4-stroke transmissions.
- Low-Profile Design: At only 30mm in height, this base integrates seamlessly with both stock and performance torque springs without requiring modifications to the clutch bell.
Comprehensive Fitment Guide
This Naraku base (NK900.44) is compatible with a wide range of 50cc and 80cc scooters, including:
| Engine Platform | Compatible Brands |
|---|---|
| GY6 50cc (139QMB) | TaoTao, Wolf, Kymco, SYM, Lance, Bintelli |
| Piaggio 50cc | Vespa ET2/LX/S 50, Piaggio Typhoon/Liberty 50 |
| Euro 2-Stroke | Aprilia SR50, Derbi Bullet/Atlantis, Gilera Runner |
| Honda Models | Ruckus (Zoomer), Metro (CHF50) - (Verification Recommended) |
Technical Specifications
- SKU: 137-80
- Manufacturer MPN: NK900.44
- Overall Height: 30mm
- Includes: Spring base, ball bearings, and hardened bearing race
- Requirement: Must be used with High-Temp Bearing Grease
Pro-Tuning Note: This kit does not include a torque spring. For the ultimate performance setup, we recommend pairing this base with a Naraku or NCY 1000-1500 RPM Performance Spring to match your rider weight and terrain.
Note: Professional installation is recommended. High-temp grease is required for the bearing assembly to ensure longevity.
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.
