POLINI D.3.9 Contrast Spring Sphere/Zip

The POLINI D.3.9 Contrast Spring for Sfera/Zip is a fundamental component for optimizing the operation of the variator group, especially when modifications are made that significantly increase the engine power. This spring is designed to tackle the transmission challenges that may arise following the installation of high-performance transformation kits.

With an increased load compared to the standard spring, POLINI springs offer a 10% increase for the blue versions (MaxiScooters), 7% for the white versions (Scooters 50), and 15% for the blue versions (Scooters 50). It is important to note that the use of springs with a higher load should be reserved for situations where it is truly necessary, as a spring that is too stiff can compromise transmission efficiency, causing premature wear of the belt.

The spring is equipped with the innovative EVO SLIDER, a special wear-resistant and self-lubricating material that ensures smooth and consistent movement during the variator's shifting excursion. This system improves the response and durability of the component, ensuring optimal performance.

For installation, it is necessary to remove the transmission cover and follow the specific instructions, paying attention to the correct installation of the EVO SLIDER. It is advisable to check the condition of the transmission belt before replacing the spring to ensure flawless operation of the variator system.

• Increased load compared to the standard spring
• 10% increase for blue versions (MaxiScooters)
• 7% increase for white versions (Scooters 50)
• 15% increase for blue versions (Scooters 50)
• EVO SLIDER wear-resistant and self-lubricating material
• Smooth and consistent movement during the excursion
• Improvement in response and durability of the component
• Removal of the cover required for installation
• Recommended check of the transmission belt condition