Our Goldstar Clutch Kits are a great all around kit for aggressive trail riding with excellent backshifting and throttle response. The Goldstar weights have wicked acceleration and are adjustable up to 22 grams per arm. We set you with a firmer primary spring and a secondary spring for better backshifting and less clutch belt heat. Then we finish off the kit with our progressive cut multi-angle helix. Great performance at a great price!