Idling adjustment

There exist a little angle of dead zone on throttle butterfly of Solex 34PICT3 carburetor, the inconvenience is like this, from the idling position the motor rotation doesn't accelerate immediately when acceleration wire was pulled. The stumbling and hesitating phenomena may be caused by this silent period, dead zone?

As an experimental trial, how about eliminate this dumb angle at idling position by screwing in the idle stopper adjusting screw?
Reversible trial must be worth doing in order to seek and decide the most adequate throttle butterfly opening position in initial point, idling position.
Throttle butterfly angular position is very important not only for idling phase but also from low to middle speed rotation with natural transition.

Basically lean setting Solex 34PICT3 is sensitive in adjusting transient at lower regular revolution.
Trends migration with smooth connection must be established.
Of course I know that the specialized professional's keen sense is required to carry out this adjustment perfectly, I'm going to do that!