Whoa, full stop.. Man, you don't even know if the carbs need anything but a clean-up and bench sync. Here's a good guide.
http://www.salocal.com/sohc/tech/carb/carb.htmClick on any one of the small pictures to expand into the guide and from there you can go next previous etc. It is a very good guide. Usually for bikes that have sat for extended periods of time, the float bowl area will look really bad but still be OK with careful work. I use Pine Sol to soak metal stuff overnight, NO plastics or rubber. Rinse thoroughly with fresh water and dry with compressed air.
I built a simple plywood box with salvaged plexiglass top, you could also use glass (I will assume you know to be careful), cut two 4 inch holes for my arms, one 2 in hole in one end for air and feed hoses. I bought a cheapo "siphon sand blast gun" on sale $18 (hey wait, I posted a thread on this..) anyway I use baking soda instead of sand. Baking soda will clean crud but not cut into critical surfaces. I've cleaned very nasty stuff to spotless very quickly. It's great for small brass parts like pilot jets with the tiny little tips you can easily break using a wire "toothbrush". Soda brings it all to a great burnished finish. If you use soda, give the parts a quick dunk again in Pine Sol maybe 10 min, thorough fresh water rinse and dry as before.
Usually you will only need Orings and a float bowl gasket which usually is just an Oring held with just a
trace of gasket glue suitable for fuel. When I say trace, imagine a Marine drill instructor yelling in your ear.. use a toothpick and put a trace of glue where the Oring needs to be and stick it in place.
Quit getting scared and thinking about ordering anything. Get it apart and have a look, which is probably the thing your mechanic did not do.
Follow the guide. Don't worry about your inexperience. I had never done 4 carb systems before and I followed a similar guide for CB900C carbs - I have so far turned two bikes which sat 7 and 9 years respectively into kittens that pur. At the end of the guide is the process normally called bench sync, where you get the carbs all synchronized mechanically. Do that very carefully and your bike will run well. A dynamic sync may make some improvement, but do make sure your valves are all spot on first or the dynamic sync is useless.
While you have the tank off, flush it and install a small inline filter (best ones are at lawnmower shops). The filter has an arrow, make sure it goes with the direction of flow. Tank, filter, carbs, and you will be fine.
You got that mister?? Hu-rah!!
