When I clean a carburetor, I use a spray can with it's little plastic "straw" to backflush the idle, transition and high speed circuits by placing the end of the straw over each orifice and blowing the s#^t out of them.
This is best accomplished when the idle mixture screw, emulsion tube and main passageway screw plug are all removed.
I then use the straw to blow the cleaner through each passageway while observing how it flows out each orifice.
The idle orifice can be seen and accessed with the throttle plate closed. But, the transition and high speed orifices will need the throttle propped or held open to see and clean them.
I continue to repeat the backflush and then foreflush operation until I get satisfactory flow from each orifice.
Let us know what you find and good luck.