check out the DOHC carb cleaning thread. Should be easy to find with a search. Lots more info in that than I can type out here.
Congrats on the purchase
One word of advice for a cafe build - don't run pods unless you're okay with poor performance and/or a shit ton of work. Only way to really get pods to run well on the DOHC's is to buy different carbs which may cost you more than you paid for the bike.
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.