POLINI 350 Piaggio Contrast Spring

The POLINI contrast spring is a fundamental 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 is designed to tackle the challenges posed by performance increases, preventing belt slippage and ensuring that the movable rear sheave can effectively counteract the movement of the pulley mounted on the crankshaft.

The POLINI contrast springs offer higher loads compared to the standard springs: 10% for the blue spring (MaxiScooters), 7% for the white spring (Scooters 50), and 15% for the blue spring (Scooters 50). It is important to note that the use of springs with increased load should be limited to cases where it is truly necessary, as the best performance is achieved using springs that allow for optimal power transmission with the least possible load. Springs with excessive loads can indeed trap the belt between the pulleys, increasing wear and reducing transmission efficiency.

Furthermore, the contrast spring is equipped with the EVO SLIDER, an innovative system made from special wear-resistant and self-lubricating material, which allows the spring to slide smoothly and consistently during operation. This design improves the response of the variator and contributes to a longer lifespan of the transmission system.

For proper installation, it is advisable to follow specific instructions, paying attention to the wear condition of the belt and ensuring that the entire variator group functions perfectly.

• Increased load of 10% for the blue spring (MaxiScooters)
• Increased load of 7% for the white spring (Scooters 50)
• Increased load of 15% for the blue spring (Scooters 50)
• Design aimed at preventing belt slippage
• Compatibility with high-performance transformation kits
• EVO SLIDER system made of wear-resistant and self-lubricating material
• Smooth and consistent sliding during operation
• Improvement of variator response
• Increased lifespan of the transmission system
• Recommended installation following specific instructions