Polini Torque Spring for Yamaha Zuma 50
Polini Torque Spring for Yamaha Zuma 50
$30.36
Out of stock
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Product Details
DESCRIPTION: Polini Performance Clutch Torque Spring for Yamaha Zuma 50 2-stroke and 50F 4-stroke models. Also fits many Minarelli and Minarelli clone scooters. 15% Stiffer Than The Stock Torque Spring.Also fits the following models:Adly:50cc ATVsAprilia:Scarabeo 50 2TBenelli:Pepe 50, Quattronovex 50Eton:Beamer 2, Viper 50Keeway:Matrix 50, F-Act 50, Hurricane 50Malaguti:F-12 Phantom, Firefox, Yesterday 50Yamaha:Jog, Vino 50, C3 (2T and 4T)Made in Italy!15% Stiffer Than StockMade in Italy40QMB 50cc 2-stroke, Yamaha
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, Minarelli, 2-Stroke, 4-Stroke
- Fits Models / Common Applications: Yamaha Zuma and other compatible models may apply.
- Fitment Notes: Performance, 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 Yamaha?
A: This SKU is listed with Yamaha 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 | 0.7 lbs |
|---|---|
| Dimensions | 4.5 × 4.5 × 6 in |
| Condition | New |
|---|
Polini performance CVT torque spring for the Yamaha Zuma 50 and Minarelli-based 50cc scooters. Runs 15% stiffer than stock, applying constant lateral pressure against the rear pulley sheaves to keep the drive belt loaded within the optimal powerband. Eliminates mid-range transmission lag, sharpens throttle response, and improves back-shift response on deceleration. Made in Italy.
Off-road use only. Not intended for use on public roads or land. Performance upgrades are considered racing parts and are not covered by warranty.
Tuning note: A stiffer torque spring alters CVT balance. If the transmission stays in a low ratio too long or over-revs, increase roller weight slightly to counterbalance the new spring rate.
Installation tip: The rear clutch pulley is under heavy internal tension. Always use a dedicated clutch compressor tool when loosening the retaining nut.
Key Features
- 15% stiffer than stock — raises shift RPM to bypass factory flat spots
- High-tensile silicon-steel alloy — resists spring sag and thermal fatigue
- Improves back-shift response on deceleration
- Made in Italy by Polini
| Spring Rate | +15% over OEM stock |
|---|---|
| Material | High-tensile silicon-steel alloy |
| Color | Blue |
| MPN | 243.093 |
| Brand | Polini |
| Origin | Made in Italy |
Fitment
| Brand | Models |
|---|---|
| Yamaha | Zuma 50 2T, Zuma 50F / 50FX / C3 / Vino 4T, Jog 50 / Jog RR |
| Genuine Scooter Co. | Buddy 50, RoughHouse 50, Rattler 50 |
| Aprilia | Scarabeo 50 2T, SR 50 (Minarelli) |
| Adly / Keeway / Eton | Beamer, Matrix, F-Act, Hurricane, Viper 50 |
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