I was able to search and find the diagrams online.
Here is the CV carb. You can see in the diagram that the Pilot Jet is in a hole with nothing allowing air or fuel to get to the sides of the jet. The only flow is for the fuel to flow upward through from the float bowl - the top of the pilot jet is seated against the carb body and the bottom is sealed with the threaded portion. The fuel then mixes with air in the passages drilled into the carb body, air is coming from an air passage around the needle jet (main jet) and the air comes through the main air jet at the inlet to the carb body.
(Since the pilot jet is in a blind hole....the bleed holes don't do anything).
In the Mikuni round slide carb, the idle mixture is adjusted by an air screw. The pilot jet has an air chamber on the side of the pilot jet, and when you adjust the air screw it controls how much air enters the side of the pilot jet and mixes with the fuel coming up from the float bowl. The size of the pilot jet can be changed....and to make it even more confusing some of the pilot jets have different combinations of holes in the side of the pilot jets. The diagram is a little confusing - but follow that air path from the air screw down below the diagram and below the carb....it then goes over to the right and then into the left side of the carb at the pilot jet......and that is where the air is entering the side of the pilot jet - it has an air chamber around the side of the pilot jet.
And....here is a diagram that shows how the Throttle Enrichment Valve works. You can see that the fuel is provided through the pilot jet circuit, and this explains why changing the pilot jet can affect the pops and bangs during deceleration when the TEV valve functions.