Disassembling carb.

Careful inspection proved that there are some critical deformation on automatic choke modular coupling connection. Too tight fitting prevent the module rotate so smooth as to adjust adequately.
This deformed distortions on the coupling surface must have brought ill tightening torque, misunderstandings of construction.
Former engineer or just a laymen must have given too strong muscle actions? Though the screw are the same as another metal to metal constructive portions, these 3 screws play a part of not tightening but exerting some adequate pressure on the round spring choke module holder. So the torque here is at the rate not to be loosening by vibrations and by the thermal cycles in the engine room.
Distorted round shape inside here made it difficult for the module to rotate in actual adjusting situation, this inconvenience obliged me to adjust by grinding convex portions manually, as for myself, being relatively good at this kind of fine adjustments.
The errors on this Bocar 34PICT3 carburetor would be corrected with careful checking and adjusting from now.
The fundamental problem on this device reported in every Web site, backlashes in throttle butterfly supporting center shaft formed with the case on both sides is checked.
Some lateral displacement of butterfly was observed when coming to most closest position, being relatively easily solving problem by inserting some adjusting sim there.
The history and biography of this second handed 34PICT3 is not so wrong except the deformations on the choke module coupling.
The vertically lined splay holes 4 in total that is the same as Solex 34PICT3 as widely reported.

The replacement of ignition coil from Lucas Gold 7 ohm into Bosch original one with 3 ohm resister value awakened the performance of VW 1302 Super Beetle this afternoon.
I realized the importance fo coil first stage resister value matching if the different parts may serve admirably.
Nervous and sensitive difficulty in the motor performance disappeared throughly and now feel I very comfortable in 1600cc AD motor's performance.
Next, the spark plugs must be checked to know the combustion stare.