1975 BMW R90/6 speed wobble problems. HELP!!
I have a 1975 BMW R0/6 that is in great shape, purchased it from an english fellow who rode from alaska to new orleans. It runs great and all is well except one major problem.
When I get up to around 70 MPH there is a fairly unpredictable wobble that begins randomly. speeding up makes it worse, slowing down to under 70 cures the problem. Sometimes I can up to 80 or more without it occuring, but then out of nowhere, it happens.
I have noticed that when I add a good amount of weight (ie second passenger, or my camera gear (45pounds) to the rear seat of the bike, there is no wobble issue.
So I loosened the rear shocks a bit but that didn't seem to cure the problem
any advice or knowledge would be greatly appreciated.