Like said above, i would check and see if your floats in both carbs are set between 20-22mm. Then if so, move onto the needle/seat. You can read about it here. takes 15 mins or so to adjust your floats your first time..near the bottom of this link http://www.dfn.com/benkaren/jetfaq.html
About your idle, do you still have your TORS on top of the carbs? (Big funky mofos gray things on top of the carbs) If so, then you will see a big knob with a slot in the top on top of the TORS. Turn them clockwise to raise idle and counter clock wise to lower it. Do both EXACTLY the same. Start with a 1/4 turn on both (counterclockwise)...ride it around for a minute or two and see how it idles, and if you want the idle a bit lower do another 1/4 turn on both the same..
If you have no TORS, well then the idle screws are on the side of the carbs, do the same as what i said above when turning them to adjust the idle.
Here are stock carbs with NO T.O.R.S>>> http://i27.photobucket.com/albums/c164/savage_420/Bansheecarb01.jpg
Here are stock carbs WITH T.O.R.S>>> http://i27.photobucket.com/albums/c164/savage_420/Carbsandreedsforsale001.jpg
Let us know whats up man!!