Doug, it is too much fun to ride! Besides it has collected a sizable amount of patina since it was last restored which I estimate to be about 30 years ago. I have decided not to do much at all about it's warts. If I was to restore it to a high level it may not be as much fun to ride. It seems like a cryin shame to tear apart such a wonderful running bike for a restoration, so I won't.

I agree, it deserves to be ridden, and not "restored". There was an article in Hemmings a few years ago about how some collectors were realizing that a vintage vehicle in good original condition is more desirable than a restored one.
Plus, you can tell admirers that this engine design won more than a dozen times at Isle of Man Tourist Trophy.
PS: I think the seat mounting needs looking at - the seat is jammed up on the tank.
Dan