Jet -MIKUNI (type: VM11/22) VM-

If, on the other hand, it is too large, the mixture is overgreased, the engine runs very unevenly and can only deliver a fraction of its possible power.
Here the ideal compromise has to be found.

To determine the main nozzle, the first step is to choose a size so large that the target should be an engine stuttering strongly under full load. Of course it needs some experience, but a nozzle is also quickly changed.
If you found such a nozzle, you now mount a smaller nozzle until the engine under full load no longer stutters.

Thus one already has an ideal basic nozzle that ensures that the engine does not get too little fuel under full load, which it also needs to cool the piston and cylinder. A safety optimum is represented by a motor adjusted in this way, which throttles very slightly for a short time when u
(machine-translated)