STM has incorporated their patented Evoluzione diaphragm spring design into a clutch system for the Honda CRF450, Yamaha YZ450F, Suzuki GSXR1000, Yamaha R1, Aprilia Clutches. Utilizing the factory suppiled baskets and clutch plates the STM slipper has demonstrated itself to work very effectively in a wet environment. After years of experiance and testing satisfaction in the production of competition engines components, STM uses the same technology, which has been already used on dry clutches and on wet clutches.

Results: performance gets better, components lubrication increases the efficacy of the system. This System, working with steel balls and ramps, helps the pilot while turning avoiding the rear wheel to slip during a hard braking. Also if you use it on everyday roads there are some advantages: it avoids dangerous skiddings, it increases safty and protects in internal parts of the Engine. It avoids extra strokes, and reduces tyre wear of the rear wheel.