Eliminate torque spring bind in your CVT with the NCY Bearing Spring Seat. Standard spring seats allow the torque spring to twist against the clutch pulleys, causing inconsistent shifting and dead spots in acceleration. This NCY upgrade uses a ball-bearing track so the spring rotates freely — smoother back-shifting, reduced friction, and snappier throttle response. Compatible with stock and aftermarket torque springs. Made in Taiwan by NCY.
- Design: needle/ball bearing sandwich plate
- Construction: high-tensile steel races
- Fits: 107mm or smaller clutch diameter
- Compatible with stock and aftermarket torque springs
- Weight: 0.1 lbs
- SKU: 1200-1253
- Made in Taiwan by NCY
Compatible Engines / Models:
-
139QMB / QMB139: all Chinese 50cc 4-stroke scooters (TaoTao, Wolf, etc.)
-
Honda Dio / Elite 50: AF16, AF18, AF25 engines
-
Kymco / SYM 50cc: ZX50, Agility 50, Fiddle 50
Mechanic's note: One of the best "secret" mods for the 139QMB engine. Makes a noticeable difference in throttle response, especially paired with a 1000 or 1500 RPM torque spring. Lightly grease the bearing with high-temp CVT grease during installation.
California Prop 65 Warning: www.p65warnings.ca.gov
Features
- Ball-bearing track eliminates torque spring bind — smoother back-shifting and hill climbing
- Reduces metal-on-metal torsion — extends torque spring life
- Snappier throttle response through CVT gear ratio transitions
- Compatible with stock and aftermarket torque springs
- Fits 107mm or smaller clutch diameter — 139QMB, Honda Dio/Elite, Kymco/SYM 50cc
- Made in Taiwan by NCY
Specifications
Design: Needle/Ball Bearing Sandwich Plate | Construction: High-Tensile Steel | Fits: 107mm or smaller clutch | Weight: 0.1 lbs | SKU: 1200-1253 | Origin: Taiwan
Model Fitment
139QMB / QMB139 50cc 4T (TaoTao / Wolf / all Chinese 50cc scooters) | Honda Dio/Elite 50 AF16/AF18/AF25 | Kymco ZX50 / Agility 50 | SYM Fiddle 50
