hi i have a 99 cbr 600 fb carb. it currently dont run i took the air box off to look in the carb and the 4 needles that trickle gas out dont they pour gas out of them. i took the carbs off and cleaned the bowls out and made sure the floats where cleaned and work put back together and still the same prob. if i take the gas tank off and start it it will run for couple of mins. then shuts off. any ideas on what i can do or try. any more info just ask please help me

 

Have u checked the spark plugs and coils?