Description
This Naraku Performance torque spring base fits 50cc 139QMB engines, including Aprilia, Honda, Piaggio, Derbi, Kymco, and many more!
Naraku’s Torque Spring Base allows for smoother torque spring action with ball bearings, which allow the spring to pivot and turn free rather than binding up.
NOTE: Does not include the torque spring but performance springs are available online. The photo is for reference only.
Specifications:
- NK900.44
- Overall 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 below
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.






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