I know it is a hard thing to do, but now that you know it will run, stop trying and start at the top (tank) and work through each system, top to bottom, front to back. There is not a huge amount of things to go through. Make sure everything works the way it is is supposed to and is adjusted correctly. When the Battery, ignition timing, coils, plugs, oil pump, carbs, cables, sync, clutch and chain are all cleaned and adjusted to spec, Kick it. You will likely be rewarded, on about the 2nd or 3rd kick with smoky pleasure of the legal type. Enjoy.
Got Brakes?
