Ok, so I did the clear tube test. Got her to fire up of her own accord! It's definitely a step in the right direction. Still only runs with the choke on though. I think I may have stumbled across the answer in the vast expanses of the interwebs though. From what I can tell, somewhere along the way Mikuni decided to remove the tube that runs between the main jet and the pilot jet allowing fuel to flow straight into the pilot jet rather than be re directed through the main. When I got a rebuild kit for the carbs, they came with the rubber pilot jet plugs. Naturally with this being my first bike and my first adventure into the wonderful world of carburetors, I assumed they were necessary and the PO had removed them for whatever reason.
I'm wondering if the answer to my prayers is to simply remove those plugs and allow fuel to make it to the pilot jets. Thoughts?
1985 ZN1100 B2 Shaft