CR250 Jetting Question

[QuentinCR250]

Hi all a very quick jetting question that some of you experts might be able to help me with, I have just fitted a S7 nozzle to my 2001 CR250 and test ridden it, it seems to be a different bike to before and runs great the only problem is on idle I can hear it hunting which indicates a lean condition, how can I richen up the idle without changing the rest would I use the air screw? or perhaps I should play safe and drop the clip on the needle to the 3rd groove down its currently on the second down from the top. I have searched alot of old post's but maybe someone can answer this quickly for me.
Thanks alot....

p.s (Pilot jet is a size 30 with 400 main) alot of guys are happily running the 30 pilot with S7 Nozzle so I dont think I have to change the pilot Jet?)

 

[KX02]

If it is acting lean at idle, yes try richening the air screw, by turning in clockwise. If that does not do it you may need a bigger pilot jet.