POLINI D.4.1 Contrast Spring Evo-Slider PIAGGIO

The POLINI D.4,1 Evo-Slider contrast spring is a fundamental component for the proper functioning of the variator group, especially when using high-performance transformation kits. This product is designed to ensure adequate loading of the rear movable pulley, helping to prevent belt slippage. The supplied springs increase the load compared to the stock ones: 10% for blue springs (MaxiScooters), 7% for white ones (Scooters 50), and 15% for blue ones (Scooters 50). It is important to note that the use of a spring with an increased load should be limited to cases where it is truly necessary, as optimal performance is achieved with lower load springs.

The Evo Slider, made from special wear-resistant and self-lubricating material, allows the spring to slide consistently during the variator shift excursion. This mechanism reduces wear and improves transmission efficiency. Before proceeding with the spring replacement, it is advisable to check the condition of the transmission belt and the proper functioning of the entire variator group.

Installing the POLINI contrast spring requires the removal of the transmission cover and the correct positioning of the Evo Slider, following specific instructions to ensure precise and secure mounting.

• Compatibility with high-performance transformation kits
• Increased load compared to stock springs:
  • 10% for blue springs (MaxiScooters)
  • 7% for white springs (Scooters 50)
  • 15% for blue springs (Scooters 50)
• Special wear-resistant and self-lubricating material
• Consistent sliding during the variator shift excursion
• Reduction of wear and improvement of transmission efficiency
• Requires removal of the transmission cover for installation
• Precise and secure mounting following specific instructions