POLINI D.4 Evo-Slider Contrast Spring PIAGGIO

The POLINI D.4 Evo-Slider contrast spring is an essential component for optimizing the performance of the variator group, particularly in situations of high power increase. This spring, designed for the rear movable sheave, offers a higher load compared to the stock spring: 10% for the BLUE model (MaxiScooters), 7% for the WHITE model (Scooters 50), and 15% for the BLUE model (Scooters 50).

The EVO SLIDER, made from special wear-resistant and self-lubricating material, allows the spring to slide consistently during the variator shift excursion, reducing friction and improving transmission efficiency. It is crucial to use this spring only when necessary, as excessive loads can trap the belt between the pulleys, increasing wear and decreasing performance. Before proceeding with the replacement, it is advisable to check the wear condition of the belt and the proper functioning of the entire variator group.

The installation instructions are simple: after removing the transmission cover and the movable sheave, you can replace the original spring with the POLINI one, ensuring to follow the guidelines for correct installation.

• Increased load: 10% (BLUE model - MaxiScooters)
• Increased load: 7% (WHITE model - Scooters 50)
• Increased load: 15% (BLUE model - Scooters 50)
• Special wear-resistant material
• Self-lubricating material
• Friction reduction
• Improvement of transmission efficiency
• Easy installation
• Belt wear condition check recommended