where is the air/fuel adjust on my 2002 homda foreman s. cant find it

 

On many of the newer machines, the fuel adjustment is 'hidden' behind an aluminum plug. You may have to pry or drill out this plug to get to it. On my old 250 dirt bike (Honda XR250) had an 'ear' brazed to the screw so that you could only turn it about a half round or so.
I think this is because the EPA is starting to require emissions on off-road engines.