Next question Guys. If my serial number  after checking with MAXBMW says that I have a 77 R100/7T, but my registration say its a 1979. Which do I go by when buying parts or re-registering the bike. I'm sure BMW couldn't for see the changes that would be made to a 79 back in 77 when it was produced. I'm asking because I just found out I have to get inside the motor[comp= 80#'s L/cyl and leaking into crankcase:95 R/cyl leaking into carb]. Only paid $600 for bike and I can't quit now,and after all the great help I receaved with the kick stand issue. Thanks in advance, JIM.