After loosening lock nut 1, unscrew screw 2 until stop 3 is released.
Touch the throttle valve with your fingertip and turn screw 2 until it starts to move.
In this position, turn screw 2 another half turn and tighten lock nut 1.
Secure screw 2 and lock nut 1 by dripping a little paint onto them.
Attach the throttle control rod to the lever and adjust the throttle actuator if necessary.
[The article text was copied from an online resource «bmwman»]