UPDATE - With the carbs now clean and new OEM float valves, today marked the first legit test start.
I mounted the carbs but not the airbox so I could more closely monitor fuel leaks. Yes, I did do a bench test first. There were a few leaks on the bench, but they seemed to be improving as the gas swelled the old orings. Carb 4 still has a small leak coming out the bottom, so I'll monitor that. I did not totally de-rack the carbs based on input from another thread. As long as the fuel tubes don't leak I'll keep the assembly intact.
To test the openness of the slow jet, I fitted a fuel tube over the jet (shown below) then sprayed various fluids (carb cleaner, kroil, alcohol) into the tube letting them soak until the fluids ran through the jet ran freely. Compressed air helped the process.
The bike now starts and runs consistently, but since the airbox is not yet installed I have to constantly manipulate the choke to limit the air flow. Cyls 2&3 got nice and hot, but 1&4 were just warm. They have good compression and spark, so it must be a fuel/air issue. #4 might be too rich due to the overfill described above. I'll mount the airbox next session and see if the full system & time fixes 1&4. If so, I'll move on to brakes, tank, tires, chain, etc.
