I'm getting ready to re-enter the BMW ranks, with a possible purchase of a 1988 R100RT. My only other Beemer experience was a 1976 R90S that I put 30k miles on in about 4 years. Does anyone have advice regarding common faults with the 1988 R100RT. What should I be looking for? I know about tires, cables, brake pads, leaking front fork seals, torn seat cover, the obvious stuff. Tell me about hidden things. Should I ask that the front cover be taken off so I can see the rotor? Is there a way that I, an amateur, can check the drive shaft u-joints or the differential? I'm listening. Tell me what to look for.