Hey Zippo. I think that Cactus, a member?, former member? dunno, did a big write up on cleaning/refurbishing a regulator. It should still be in the old site archive above. You can also try to U2U him or find his email address in the old site user base. I know that his post was accompanied by a pile of pictures also. It might help.
The regulator on a 77 kz650 b1 has the same part number and swaps with:
Hey thanks, thats where I got the idea to take it all apart and clean it. Found a solid state regulator from a guy at oregon motorcycle parts, anybody ever dealt with him? Anyway I'm giving up on the old regulator and hope this will be more dependable, at least its charging now.