I had a similar thing happening to me awhile back after I removed my gas tank and un-intentionally disconnected all of the gas/vacuum lines with the petcock open (obviously I didn't know what I was doing-newbie). For about 3 days I couldn't get out of the garage because it acted like the bike was flooded, wouldn't idle, and actually had gas dripping out of the exhaust whenever I'd try to start it. I'm 90% sure that I got gas in my vacuum line. My oil smelled strongly of gas and had to be changed (thanks to this forum for catching that), and after doing that and about 3 days of sitting and making sure none of the lines from the petcock to the carbs were kinked, things cleared up. I kind of got lucky because I also had a good dose of Seafoam in the tank when I did all of this....so I'm not sure if the 3 days of sitting allowed that to clean up some mess somewhere in the lines, a float to un-stick, the gas to clear out of the vacuum line, or what happened. Regardless I'm back in business. Hope that helps some...good luck!