Ok i have a 04 Honda Rancher trx350fe. It spits and sputters running and it dies when it idles. I tried adjusting the fuel/air mixture and nothing changes but when i take off the airbox lid and the air filter with the air fuel screw at normal 2 1/4 turns out it runs great... i had a problem with it dumping fuel out of the overflow and i took care of that now this plz help.  

check the diaphram inside the top of the carb you may have a hole in it.

but if it that's not it then take it off and reclean it.
there could be some trash in it that you missed the first time around.  

ok will do i also cleaned out the airbox because of the gas dumping in that. ill check it out