Performance changed

I feel some change of air-fuel mixture in 34PICT3 carburetor this morning, because the carburetor assembly was replaced into Mexican Bocar from original German Solex. Acceleration became vigorous and my VW 1302 Super Beetle runs about so quickly like a different automobile compared with the past moment of carburetor pre-replacement.

The pressure leak was found on the portion of the arm holding nut inner surface, finding out while cleaning air gun nozzle was applied in the throttle valve center shaft. It means the air leak can be caused when the valve was closed and the reason why the bypass screw had been tightened to the closest point.
In order to prevent this kind of invisible error, much more precise checking is necessary, silicon coking material would be applied to seal there.

Automatic choke module's angular position is going to be set adequately, several trials are necessary.
Warming up time interval and the mixture control are up to the position.