How do you adjust the air fuel mixture in 1985 22-r Toyota carburetor pick-up?

To adjust the air-fuel mixture on a 1985 Toyota 22R carburetor, locate the mixture screw, typically found on the side of the carburetor. Start the engine and allow it to reach operating temperature, then slowly turn the mixture screw clockwise to lean the mixture and counterclockwise to enrich it, listening for changes in engine RPM. Aim for the highest stable RPM, then turn the screw back slightly to ensure smooth operation. Finally, secure the adjustment and double-check by test-driving the vehicle.