How do you adjust carb on 125cc moped?

To adjust the carburetor on a 125cc moped, first ensure the engine is warm and running. Locate the air-fuel mixture screw, usually found on the carb body, and make small adjustments—typically a quarter turn at a time—either richer (clockwise) or leaner (counterclockwise) based on engine performance and sound. Additionally, check the idle speed screw to ensure the engine idles smoothly at the desired RPM. Always test the moped after adjustments to confirm optimal performance.