Red: 1/2 turn out from seated - LEAN MIXTURE SLOWS MOTOR
Orange: 1 turn
Yellow: 1 1/2 turns
Green: 2 turns
Blue: 2 1/2 turns
Black: 3 turns - RICH MIXTURE SLOWS MOTOR

Recommendation: Warm the engine by riding 20 minutes. Set the fuel screw by turning inwards until the idle speed lowers by about 200-300rpm, then turn outwards 1 to 1 1/4 turns.
Note: The idle speed will fluctuate more and be unsteady as the idle mixture becomes lean and near 15:1 Air/Fuel ratio.