They are available in two different driven and simply recognizable responsible for their coloration: White-zinc-galvanized and yellow. This is a kit designed expressly to improve and optimize the performance of the attack clutch and increase the number of revolutions per minute of the engine. White-colored galvanized springs: clutch attack 3000 t / min, clutch slip at 5500 t / min. Springs yellow-galvanized color: clutch attack 3200 t / min, clutch slip at 5800 t / min. The Polini clutch kit provides better torque of the power to each motor rotation speed, departures stopped sprinting without sacrificing acceleration.The Polini clutch provides constant optimization of the transmission even when subjected to long and heavy loads. New, sold in original packaging. In stock - shipping within 24 hours. Yamaha T Max 530 from 2012 to 2016. Yamaha T Max 530 dx sx e4 ie from 2017 Kymco ak 550 e4 2017. The item ew \The seller is \This article can be shipped worldwide.