I have a 2003 Yamaha Warrior 350 and the idle is VERY high. I adjusted the idle screw and it doesn't change the least bit. It isn't just idling a bit high it is so high that it would be dangerous to leave it running for more than a few minutes. I am hoping to fix this ASAP as I am suppose to go ridding tomorrow.

 

Are you sure you're turning the idle screw? ? Its on the bottom of the Carb and I believe you screw in to turn the idle down!

 

Choke off? If yes and still idling high choke cable might be stuck. Could get lucky tapping the carb to shake it loose.

 

yes choke is off, I am sure its the idle screw (has the spring), I did try tapping and still the same.

 

Could also be stuck throttle cable. Follow it down to the carb and give it a jiggle.

 

i tried jiggling the cable im going to check in the morning its not stuck up, but the needle does look like its all the way down(moved the air filter aside to see.)

 

Yes as stated above, make sure the cable is adjusted correctly. It could also be sucking too much air from somewhere, like a cracked intake boot or o-ring gasket on the intake boot. It would also be a good time to check the air filter where it is supposed to seal to the airbox.

 

Check the intake boot for cracks causing to suck air....common on warriors.

 

check throttle cable slack should be an adjustment about 8" from throttle lever on handle bars, its covered in rubber tubing youll have to peal it back