KG Clutch Factory Complete Kit for Yamaha YZF-R1 04-05 Contains Aramid fiber high performance frictions, steel separator (drive) plates, and spring kit Designed to give rider the highest quality, best performance, and longest life for all types of riding One kit contains everything needed to get back to riding without ordering multiple part numbers Friction disks utilize specially blended cork based materials designed and manufactured to meet or exceed OEM clutch requirements Kit contains all required frictions to replace clutch