Dalton Industries Secondary Clutch Spring - 29.5in. and Larger Tire The ultimate in qualilty for riders who care about performance and want to get the most out of their equipment Extensive testing and exacting production standards create some of the best clutch tuning components in the industry Optional yellow/black secondary spring For most applications, the stock secondary spring on the 800s is preferable, but when using 28in. and larger competition mud tires this new optional secondary spring keeps low belt and clutch ratios better for the mud pits