Newbie needs help in cleanin up the GS

[Nomak]

Well it happened to me today ... I turned the bike on using the choke and as I strted to drive away she strted stalling on me. I pulled over ran her with the choke on for a few mins and then I after a few seconds when I was up at bout 40mph if I twist the throttle it felt as though the more I twisted the more power I lost eventually I had to pull over and the bike stalled. I drove rest of the way on PRI. Need help. What can I do to fix this? BTW how much does a carb clean up and sync with valve adj cost?