Suzuki Bandit Running problem, can someone help?
 

Im having a problem with my bike so ill list all the infor
2001 Suzuki Bandit 600
4 cylinder, 4 carburator
Just changed the spark plugs

I was going to ride to work and after about a mile of riding i noticed my RPMs were falling. At a stoplight it seemed like the bike was going to stall, I had to hold the revs up to keep it from stalling. I pulled over to the side to play with it and when i let go of the gas the bike stalled. I tried restarting, no luck. I tried playing with stuff, no luck. I ended up waiting about 5-10 minutes calling insurance to get it towed. I tried starting up my bike and it ran fine! I drove a little less than a mile and started having the problem again, so i puleld over and same problem. I decided to drive it home, and waited 10 minutes and it started again. Sure enough the problem came back so i just held the throttle so it wouldnt die till I got home. Even then soemtimes it wasnt responsive to gas while accelerating from a slow speed.
I jsut had the bike for a regular service, so i would expect them to have found something obvious wrong.

I had had problems before i got it serviced that i think stemmed from having the bike sit for 2 months while not being driven.
The battery turns over just fine, doesnt seem electrical.

My best guess is problems with my carburetors.