torque spring Polini +28% for Kymco Downtown 300, Kawasaki J 300 243.089

This torque spring Polini increases the pressure against the original spring by 28%, making it ideal for easy tuning suitable. The torque spring has the task of pressing the pulley in the rear converter to the belt. It also exerts pressure to allow the variator to shift. A stronger spring is required once engines have been tuned otherwise the belt slips or the engine doesn`t rev well. The torque spring is always in close contact with the variator. If another spring is mounted, the Vario must be adapted to each upgrade. Spring loading Original: 60 / 52mm / kg spring loading Polini: 60 / 66.5mm / kg wire thickness: 5.4mm Overall length: 179mm inner diameter: 57.6mm number of turns: 8