I have a 1994 kdx 200. I have noticed I have had to turn the air screw in as it has gotten cooler. How much have others had to turn the air screw in or move the clip on the needle valve?
It will all depend on atmospheric condtions (including humidity). So..whatever suits you and your bike and your environment is what's right.
'..turn the air screw.' and '..move the clip on the needle..' is a curious juxtapostion. If your AS is in too far, it's the pilot that needs to be changed (richer/larger).
That said, a change in pilot size of one or two would be fairly common with average temp drops.