The Extreme-Duty Centrifugal Sprocket Industrial Clutch is ideal for the everyday demands of go-karts and youth model snowmobiles. A thermodynamically designed clutch shoe increases this industrial clutch's capacity to absorb heat without damaging the clutch springs, resulting in longer life and better reliability. The Extreme Duty family of centrifugal clutches is designed to hold up to the rider's toughest demands, from the veteran racers to the beginners in a yard kart. This industrial clutch is specially engineered to take the heat and keep on going. The quick-change spring design makes it easy to adjust engagement speeds without a lot of time or hassle.