Originally Posted by bmwhacker
Maybe you've never had an airhead engine cover off.....
The cover is just that, no connection into the crankcase, other than the breather passing through. The hole is there to shed water that could enter through the air intake opening on the top of the cover.
As ME 109 said, the starter and the flywheel opening live in there. Could be Rear Main Seal oil coming up.
Photo of R100S cover removed:
(I had breather hoses circled for something else)
hey, I just painted my jugs. What did you use and how did it work out? Whats with the weird tank and the early style air cleaner housing?