EBC CK Clutch Kit for Yamaha WR/YZ-250/450 Virago V-Star Almost identical to original equipment clutch plates, the CK series are a cork based product impregnated with aluminum particles to increase wear life and heat resistance. Material is highly compressed to avoid swell and clutch drag and is an ideal general purpose replacement material for all grades and sizes of motorcycles. Kit includes a complete engine set of friction plates only