yep, what Shiney said.
However, if you're not feeling up to it, the guy that wrote this manual will work on your carbs:
http://www.cb750c.com/publicdocs/SeanG/Honda_Carb_Manual_revE.pdfYou will just have to send them to him. Price seems very reasonable to me.
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.