ok ya'll BE CAREFUL. Sometimes this will help an idle problem. Proced at your own risk....
Look at the butterfly in your carb, some have a hole or a small notch in the butterfly. Check to see if the notch is in line with idle jets. If not solider up the old one and use a triangle file to cut a new on inline with the jets. If your carb has a hole in the butterfly solider it up and make the notch in line with the jets.