Since 1948, Barnett clutch plates and springs have been made from the finest materials available. Through research and development, they are constantly striving to offer the best possible friction material for your motorcycle or ATV. Barnett tempered steel drive plates go through a vibratory deburring process and then are quality checked for flatness to provide optimum performance. Heavy duty Barnett clutch springs are pre-set, shot-peened, and heat treated for performance and durability. Barnett Clutch Kit: Barnett clutch kits are designed to tolerate whatever you can deliver with their top quality construction and components. Barnett has been developing their burly clutch kits since 1948 for dirt bikes, street bikes, and ATVs. Clutch kits include durable tempered steel friction plates that have been processed and tested to ensure optimum performance.