thanks for the replies. Finishing up K1 836 rebuild, after receiving my line-bored cases from Cycle X, (with many other parts), and my beauty of a head from Mike Rieck. My MLS head gasket looks almost flush with the oil galley o-rings (which measure 2.4mm thick).
So, i ordered another set of o-rings, hoping they are 2.5 - 2.6mm; to prevent any potential leaks. I have not had motor apart for 38 years. But after owning the bike for 44 years, and after reading your posts about the weldless frame kit; i need Scottly to PM me about buying a kit.