There is no "air adjustment screw" on the carbs on your bike. Your bike uses BS32SS carbs. The only adjustment screw is the PILOT adjustment screw, which simply adjusts the amount of premixed air and fuel getting to the pilot circuit, which is the circuit the bike runs on while idling, and just above idle. If you FULLY and THOROUGHLY cleaned your carbs, IE, took them completely apart as per the tutorial on the site here, and DIPPED them, then you should know that the adjustment screw is on top of the carbs, as you should have removed it when you cleaned them. If you didnt follow the tutorial, like alot of people dont, and try to simply spray the carbs out with carb cleaner, which is a monumental waste of everyones time might I add, cause it DOESNT work, and then people come on here and say they cleaned them when they didnt, and then they swear up and down they're clean, only to FINALLY, 5 weeks later actually do it RIGHT, and lo and behold, suddenly the bike runs great, then you havent removed the FACTORY PILOT SCREW PLUG that covers the adjustment screw so that people wouldnt tamper with them way back when. You need to follow the tutorial and clean them right, and the tutorial will also show you how to remove that plug, so that you can adjust them.
And, BTW, your rising idle is NOT because you're running rich I would bet, its because you HAVENT replaced the orings behind the intake manifolds, and its sucking air thru them there. A rising and hanging idle is a LEAN condition, not a rich one. There are also Orings INSIDE the carbs that will need replaced, which, amazingly enough, you get from the same perosn that sells the intake boot orings
Get your carb and intake boot orings here
www.cycleorings.com
Follow the tutorial on disassembling, cleaning and reassembling the carbs here
http://www.thegsresources.com/gs_carbrebuild.htm
If you dont do it right, the bike will never run right. Its that simple.
