I can only guess that the ever so slight difference in the frame geometry along with maybe how the engine is place in the frame combine to give clearance or not. I was running without gaskets so that wasn't even an issue. I had meant a long time ago to run a bead of RTV under the cover but never did get to it. Since I had most things already apart I pulled both covers and put the RTV on them.
Like the rest of youse guys I only had to remove the inboard screw on the left hand side. Snarf, it was no big deal really but maybe in the future you might add a little caveat emptor that in some cases you may have to remove that one screw.
I rode the bike yesterday and today and it tuns great. It was running what I would call 'tight'. Not really sure how to describe it but it just felt tight. Since then it doesn't feel that way. I think it tuns ever so slightly smoother and maybe a tad more power, but that could just be a very subjective thing but I think it is there.
Now my next big thing, the forks with my new springs and a new front tire. Still have to buy the tire though. I am also going to do the mod to put in the drain screws.