At this point tge zim is to make sure you feel got fuel supply free from chunks

and the idle jets plus side passages flow cleanly as they should.
It should be useful to run the airscrews at just one turn without the airbox in place, but only for that reason temporarily. What you're looking for is start and warm, gradually retracting choke until it'll run at idle without interference. Essentially its establishing if the idle circuit are clean and functional. Then it can be moved onto fully installed intake and should respond logically to fine adjustment with that all in place.
Likely it won't respond to "snap" throttle opening well, or if you tried to ride it and ask for productive torque.