This is a low mileage cardan unit from a R100RS that was disassembled to be used as a parts donor. The case is marked 33/11. The splines look good on both ends of the unit and there was no unusual noise coming from the drive when last operated. This unit should fit all twins from 1970 thru 1978 and could possibly later years as well. Buyer pays actual shipping costs from ZIP 92114. Other parts are also available; wheels, transmission, etc.