How do you adjust idle mixture on 2005 fatboy?

To adjust the idle mixture on a 2005 Harley-Davidson Fat Boy, start by warming up the engine to operating temperature. Use a screwdriver to turn the idle mixture screw, located on the carburetor, clockwise to lean the mixture or counterclockwise to enrich it. Make small adjustments, about a quarter turn at a time, and listen for a smooth idle; the optimal setting is where the engine runs consistently without stalling. After adjustments, ensure the idle speed is also set correctly using the idle speed screw.