air screw

Set idle a little high (2000 rpm)

Start at 1.5 turns out

Adjust with quarter turns, wait 10 seconds for idle to change

Find the highest idle with the air screw, then you are done. You can turn idle back down
 
If you change elevation or temperature, warm up the motor and adjust the idle .

If you change elevation or temperature you will also have to change your jetting/needle setting/oil ratio before you adjust the idle.