what I meant above about the throttle cable was to check it. on my bike, the cable was wrapped around the handle bars which was pulling the cable so esentially my throttle was always slightly open. no matter how much adjustment I did on the idle screw, the idle wouldnt come down. I had to untwist the cable and make it a little longer, to give it some free play, and that dropped the idle down. that would be something to check if the idle is not responding to trying other suggestions. I agree though, you wouldn't want to raise your idle doing this.