What parts do you need exactly? Not a lot changed on the DOHC from 79-82.
Have you asked the same question on the cb 750 custom site? There might be someone over there familiar with the japanese vins.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote:
Strawberries for supper. Yes, I am a lucky man.