Cork Material Clutch Friction give you an excellent Cost-Performance..Cork is used current big motorcycle such as compatible with Yamaha R1..Material for clutch friction will be decided by performance of clutch operation.7pc. SetThis item fits the following vehicle applications:compatible with Honda CR250R 1983-1989compatible with Honda CR480R 1983compatible with Honda CR500R 1984-1989compatible with Honda NX650 1988-1989compatible with Honda VF700F Interceptor 1984-1985compatible with Honda XL600R 1983-1987compatible with Honda XR500R 1983-1984compatible with Honda XR600R 1985-2000