hex0rz
+1y
Turn the idle screw outwards to turn idle down. Blip the throttle so you will know true idle...
If you've already done that, you need to adjust your throttle cable so it has some slack in it when the throttle is fully closed.
Turn the idle screw all tha way out until the throttle linkage no longer touches the screw. Adjust the throttle cable at this point with slight tension on it. Then turn idle screw inwards for desired idle...
...simple as that!