I have to disagree with the last part. If the bike fires with that spray in the aorbox, then you've proven that fluid can go through the carb body into the combustion chamber. That doesn't mean fuel from the bowl can freely move up the jets and out the carb into the combustion chamber.Pods.
I’ve seen guys tape off 2/3 of the pods filter area to get them to work.
Clean the jets till yer blue in the face.
Unless you get the gunk/varnish/crap out of the very small passages that from the idle screw you are wasting your time.
A guitar string to act as a snake, acetone squirted thru a small tube from a squirt bottle, along with 100 psi, not 40, not 50,
Put the air box on.
Leave the filter out.
Spray starting fluid in the box for about 4 seconds.
If it lights up, it ain’t the carbs.