Dalton Clutches Primary Clutch Spring DPPS-O/BL 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. The stock 800 EFI comes with 26in. tires If you choose to switch to heavier, more aggressive 26in. with 10in. wide fronts, etc., and most 27in. tires the 800 EFI will perform better by simply adding our Orange/Blue (Primary Spring) Primary spring for all 28in. and up tires use complete kit