POLINI D.3.8 Contrast Spring Evo-Slider YAMAHA

The POLINI D.3.8 Evo-Slider contrast spring is a fundamental component for optimizing the performance of the variator group, especially following modifications that significantly increase engine power. This spring is designed to tackle the transmission challenges that may arise after the installation of high torque and power transformation kits.

The POLINI contrast springs offer an increase in load compared to the stock springs: 10% for blue springs (MaxiScooters), 7% for white springs (Scooters 50), and 15% for blue springs (Scooters 50). It is important to note that the use of springs with increased load is recommended only when necessary, as the best performance is achieved with springs that allow optimal power transmission at lower loads.

The Evo Slider technology, made from special wear-resistant and self-lubricating material, ensures smooth and consistent movement of the spring during the variator shift excursion, reducing friction and wear. Before proceeding with the spring replacement, it is essential to check the condition of the transmission belt and the proper functioning of the entire variator group.

This contrast spring represents a strategic choice for those looking to maximize the efficiency of their scooter or maxi scooter, ensuring a quick and reliable response in every driving situation.

• Load increase: 10% (blue springs for MaxiScooters)
• Load increase: 7% (white springs for Scooters 50)
• Load increase: 15% (blue springs for Scooters 50)
• Special wear-resistant and self-lubricating material
• Smooth and consistent movement during the shift excursion
• Reduction of friction and wear
• Recommended to check the condition of the transmission belt
• Optimization of the variator group performance