POLINI Contrast Spring YAMAHA 125/150 XENTER

The POLINI contrast spring is a fundamental component for optimizing the operation of the variator group, particularly in situations of high power increase. Designed to fit advanced transformation kits, this spring offers a higher load compared to the stock one: 10% for the BLUE version (MaxiScooters), 7% for the WHITE version (Scooters 50), and 15% for the BLUE version (Scooters 50).

The implementation of the contrast spring is crucial to avoid slipping of the transmission belt and to ensure that the rear movable pulley can effectively counteract the movement of the pulley mounted on the crankshaft. It is important to note that the use of springs with increased load should be reserved for situations where it is truly necessary, as optimal performance is achieved using springs that allow for power transmission with the least possible load.

Furthermore, the spring is equipped with the EVO SLIDER, a special wear-resistant and self-lubricating material, which ensures constant movement and reduces friction during the variator shifting excursion. Before proceeding with the replacement of the spring, it is advisable to check the wear condition of the belt and the proper functioning of the entire variator group.

• Increased load of 10% for the BLUE version (MaxiScooters)
• Increased load of 7% for the WHITE version (Scooters 50)
• Increased load of 15% for the BLUE version (Scooters 50)
• EVO SLIDER wear-resistant and self-lubricating material
• Optimization of the variator group operation
• Prevention of transmission belt slipping
• Compatibility with advanced transformation kits
• Recommended to check the wear condition of the belt before replacement