QuestionI need to now how change the rear belt drive for a softail 99
AnswerWhat you are going ot have to do is remove the primary, clutch, motor sprocket, jackshaft, starter, and inner primary. the you have to remove the rear tire and the swinging arm bolts to get the new belt in.
Your best bet, if you are planning on doing it yoursef, is get a service manual and it will explain how to do the work
Good luck and happy riding
Mike