Fits on models: R1100S, R1150GS, R1150GS Adventure, R1150R, R1150Rockster, R1150RS, R1150RT, R850R, R850C, R1200C, R1200C K589 K1200RS-97 K1200LT-99 K1200LT-04. BMW R1150GS Transmission input shaft. Longer than standard original shaft for 2 mm for better conection with standard clutch plate.