I have a 30mm
Mikuni from Sudco on my Venom. I don't remember the needle #, the pilot jet is 35, I'm using a 400 mj, needle in the richest position. Might go to a 410 in colder weather. Not enough room for an air cleaner, oil tank is in the way. i put over 2000 miles on this bike after the
Mikuni conversion. Runs, idles good. Starts easily (I do have an electric starter on it.)
Bill Bassett