How do you adjust a weber carburetor?

To adjust a Weber carburetor, start by ensuring the engine is at operating temperature. Adjust the idle speed screw to set the idle RPM, then use the mixture screw to achieve the best idle quality—turn it in until the engine stumbles, then back out until it runs smoothly. Finally, fine-tune the idle speed again if needed. Always consult the specific model's manual for precise settings and procedures.