Idle mixture settings (KTM 350SXF)-
Red - Very Lean
Orange - Moderately Lean
Green - Good setting
Blue - Good, slightly rich setting
Black - Rich
Note: Each number change in the Green/Blue Mode is nearly equal to 1/4 turn on a Keihin FCR carburetor fuel screw, or 2 numbers is equal to 1/2 turn on the fuel screw.