The 850 Ski-Doo Turbo needs a weight that is designed for quick response yet aggressive to harness all the potential power. We have done just that and made it easily adjustable to match up with any additional tune horsepower you may be adding. The clutch weight is a very important component to match the machine's power and load requirements. Improper clutching will lead to horsepower loss and excess heat. The Force Turbos weights will minimize clutching heat and get all of your power to the snow where it belongs.