1 of four carbs works - sometimes

Fellas, I have a 77 kz1000 ltd with the stock carbs on it.   Rebuilt them, put them on the bike and my cylinder 1 isn't working.   Put compression tester in, left plug on motor, good spark, 125 lbs compression.   
Drained fuel from bowl so I know it's getting in there.   Let it run for a few minutes, hit the throttle and then all of a sudden cylinder 1 came to life.    If I wait a bit, it'll be like a process reset.   
Now I know my brain goes to the warming up expanded or sealed something but there were times I ran this thing for a while, no change.   Not sure if the brap on the throttle did it.   I didn't do float test because every time I have gas in there.   I could take out my pilot and see what's up with that but what else am I missing?    

These links may help...

gsarchive.bwringer.com/bikecliff/images/vm_carb_rebuild.pdf

gsarchive.bwringer.com/cbsaunders/gs/pilot_screw_removal.pdf

www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0