POLINI Contrast Spring YAMAHA MAJESTY

The POLINI contrast spring is an essential component for optimizing the operation of the variator group, especially in the presence of transformation kits that significantly increase the power and torque of the engine. This spring, designed for the rear movable half-pulley, offers an increase in 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 adoption of a spring with increased load should only occur when strictly necessary, as the best performance is achieved using springs that ensure optimal power transmission with the least possible load. It is important to note that springs with higher loads can compromise operation by trapping the belt between the pulleys and increasing wear.

Additionally, the contrast spring is equipped with EVO SLIDER, a special wear-resistant and self-lubricating material that allows for constant smoothness during the variator's shifting travel. This system improves the efficiency and longevity of the component, ensuring smooth and responsive operation.

For proper installation, it is essential to follow specific instructions, paying attention to the wear condition of the belt and the operation of the entire variator group before proceeding with the spring replacement.

• Load increase: 10% (blue model - MaxiScooters)
• Load increase: 7% (white model - Scooters 50)
• Load increase: 15% (blue model - Scooters 50)
• EVO SLIDER material: wear-resistant and self-lubricating
• Constant smoothness during shifting travel
• Improvement of efficiency and longevity of the component
• Importance of following specific installation instructions
• Attention to the wear condition of the belt and the operation of the variator group