Pete,
An R11 Drain plug is the same size for the head plugs. I just lost one and had to replace it on my 83 R100. Cheap fix $4.
Just because a beemer is dragging doesn't mean you can't go through that corner faster. I scrapped the hell out of my covers the first time out on the track. Scary hits too. Now with better lines, better throttle input (On the gas), hanging off, and stiffer susspension, I rarely touch down.
Cool bike you got there.
BFD and I saw 3 sweet VRRA racers this past weekend in Quebec; an R65, an R75 and an R80. All had been lifted and a couple had the lower frame rails that were removable to pull the engine out the side in about ten minutes.
Beemerless rider no more soon.
Jeff