Gaskets......
Never use any type sealer on the carb gaskets.........the one most important thing in rebuilding the carb is to make sure, all gasket surfaces are clean and dry.
A carb is set up to remove and take apart more than once, using the same gaskets. If you use some kind of sealer, you'll only use them once. A carb also has a lot of internal porting.......any sealant in the ports, and your not going to have a clean running carb.....
When I rebuild a carb, I remove all the parts except the jets. Then, I use the little red hose that comes on a can of CRC or Carb cleaner. Brake parts cleaner is cheaper and works well too. Then, I stick that tube in the holes (internal porting) of the carb, give it a tote on the spray nozzle. Look for the spary to exit from a different area of the carb. Do this to all holes, to make sure they are clean. Open your low speed screw about 4 turns, to make sure you clean any trash that has gotten to the seat. Open the high speed screw about 1/2 turn, do the same.........
Dry everything out, follow the instructions in the Mikuni SHop manual or go to my thread in "Snipes Korner" and you'll find a 3 page write up on carbs.....
I think I have a link at the bottom of my signature to "snipes Korner"....
Good luck, let us know how you do......:cheers: