I'm having some issues. First off its a 1999 750 ace dual carb. Rebuilt everything with the 45 jets. Velocity exhuast and straight pipes. Sounds awsome. But it won't idle with chokes closed. Dies instantly. 2, it started spitting watered down gas out the exhuast after starting it a few times trying to get the air fuel right. I started off at 2 and 3/4 turns and tried 2 and 1/2. Idk what my idle is at as I don't have a tach. Kinda hard to start as well. 
@Aidan James your float valves arent seating and gas is getting past the carb into the combustion chamber. shut off the gas immediately!
stop trying to start it, you will Wash the cylinders and get fuel into your oil. no fun for anyone!
gotta pul the carbs and figure out why the float valve isnt seating.
if you dont have an inline fuel filter, get one.
I pulled the carb. Float needle seems to be working fine. I pulled the neutral safety switch as that went out and probably half to a full gallon of oiled down fuel came out. Plan to flush it out but still don't see what's wrong with it. 