Pre- originale steel clutch springs with ad high yield load, protected by da galvanic treatment ad high thermal resistance. The different coloring highlights the load of each series of springs. This soft kit allows you to increase the clutch attachment speed up to 500 rpm with steps of 150 rpm per spring type. Products reserved exclusively for competitions in the ad intended for them in accordance le the provisions of the competent sports authorities. We disclaim all responsibility for misuse