Polini
Description
This Polini +15% contra spring helps your scooter put its power to work with firmer rear-pulley belt control and CVT shifting tuned to your engine. Made in Italy for compatible Honda PCX, GY6, and other scooter applications, it adds spring load when your setup needs more support than the standard spring provides. Pair it with the right belt and roller weights to dial in how your scooter responds when you roll on the throttle.
Key Features
- Increased spring load: The +15% specification provides a firmer option for tuning the rear pulley.
- CVT shift tuning: Works with the variator, belt, and roller setup to influence transmission behavior.
- Blue finish: Easily identifies this Polini spring in your tuning supplies.
- Made in Italy: Manufactured by Polini for compatible rear-pulley applications.
- Installation guide: Download Polini's compression-spring and EVO Slider instructions below.
Technical Specifications
- Brand: Polini
- Part number: 146-68
- Manufacturer reference: 243.076
- Part type: Rear pulley compression / contra spring
- Load increase: +15% versus the specified original spring
- Polini spring load with EVO Slider: 30 kg at 75 mm
- Original spring load: 25.5 kg at 75 mm
- Number of coils: 7.2
- Wire diameter: 4.2 mm
- Free length: 150 mm
- Inside diameter: 49.5 mm
- Color: Blue
- Country of origin: Italy
Compatibility
| Brand / platform | Applications |
|---|---|
| Genuine / PGO | Buddy 125/150; GMAX 150 GY6 / Genuine Blur 150; PGO / Genuine Rattler 110 |
| Honda | PCX 125 (2010–2014 reference range; US model years 2011–2013); PCX 150 (2012–2020 reference range; US model years 2013–2020); ADV150 (2020–2022); SH 125; SH150i (up to 2012 reference range; US model years 2010–2011) |
| Kymco | Agility 125/150/200i; Like 125/200i; People 125/150/200; People S 150; Movie 125/150; Super 8 125 (US Super 8 150 requires fit check) |
| SYM | Fiddle II 125/150; GTS 125/150; HD200; RV200; Symphony SR 125 |
| Piaggio | Liberty 150 3V ie / iGet |
| GY6 | 152QMI / 157QMJ 125/150cc configurations with matching rear-pulley spring dimensions and seats |
Confirm Polini reference 243.076, spring dimensions, spring-seat fit, and rear-pulley configuration before installation. A contra spring controls the rear pulley; it is not a clutch-shoe engagement spring. Performance depends on the complete CVT setup rather than spring stiffness alone.
Polini recommends using the lowest spring load that transmits power effectively. Excessive spring load can increase belt wear and reduce transmission efficiency. Check belt condition and variator operation before changing springs. The shared guide covers multiple spring families; its general color/load examples do not replace this part's specific specifications. EVO Slider instructions apply only where supplied with the applicable product and do not establish that a slider is included here.
This product is intended for off-road use only. This product is not intended for use on public roads or land.
Installation Instructions
Download Polini Compression / Contra Spring Installation Instructions (PDF)
Product Diagrams
Features
Specifications
Brand: Polini; Part number: 146-68; Manufacturer reference: 243.076; Type: Rear pulley contra / compression spring; Load increase: +15%; Spring load with EVO Slider: 30 kg at 75 mm; Original spring load: 25.5 kg at 75 mm; Coils: 7.2; Wire diameter: 4.2 mm; Free length: 150 mm; Inside diameter: 49.5 mm; Color: Blue; Origin: Italy
Model Fitments
Honda PCX 125 (2010–2014 reference range, US 2011–2013), PCX 150 (2012–2020 reference range, US 2013–2020), ADV150 2020–2022, SH125, SH150i (up to 2012, US 2010–2011); Genuine Buddy 125/150, Blur 150, Rattler 110; PGO GMAX 150 GY6, Rattler 110; Kymco Agility 125/150/200i, Like 125/200i, People 125/150/200, People S150, Movie 125/150, Super 8 125 (US 150 fit check); SYM Fiddle II 125/150, GTS 125/150, HD200, RV200, Symphony SR125; Piaggio Liberty 150 3V ie/iGet; GY6 152QMI/157QMJ 125/150cc with matching spring dimensions, seats and rear pulley configuration.
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
