Thanks if you have time I would really appreciate to see some pics.
Thanks for the info. That makes me feel better about the potential condition of the heads and pistons. A lack of aftermarket support really makes these items expensive. I will look into finding a machine shop to grid the valves.
If I go this far I feel I may as well split the cases. One thing I want to replace is the oil pressure plunger (as documented by Pydon) as I have occasional timing chain clatter when the bike is hot.
I may leave the crank bearing as is depending on what they look like, I just did not know if that was more reliable than a ball bearing.
I was looking at the shift drum because it is an engine update. However, mostly I will have a fixed budget and will need to prioritize what I replace once I am in there. Thanks for the heads up on the output CS and clutch bearing