Mixture control

Thanks to the efforts on driver's door hinge adjustment a few days ago, roof leak has disappeared, ill-setting up, upper hinge too much outside must have brought the phenomena from the beginning 40 years ago.
Now the right door is in good condition including rocking construction repaired on last Saturday.
Motor stopping tendency while idling after the first idle stage suggests me to adjust the Solex 34PICT3 carburetor on the mixture, though very precise adjustment technology is required on the way.
Anyway I feel some lean tendency at all stage, no fuel smell is discerned in exhaust gas.
Some considerable change must be carried out if the air-volume adjusting screw may be turned in intending richer mixture.
Initial position of the screws,bypass and volume must be remembered prior to the further adjustment, otherwise I'll be at a loss in case of some confusion.