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Only 107 days till Vogel !

I took a new approach based on the fact that the carbs are supposed to be wet checked while they're on a running motorcycle. A running motorcycle produces a lot of vibration. Without changing any of the dry float settings away from the recommended 28.5mm, I hooked up the test set, opened the fuel drain screw, and then tapped on the carb with a screwdriver handle for about 1 minute. Sure enough, the fuel level in the clear hose rose up substantially and then settled to a consistent level despite continued tapping. By dry setting the carbs at 28.5mm, the wet fuel level ended up being: 1--15.75mm, 2--16.25mm, 3--15.75mm, 4--16.0mm. With these settings, all of the float tangs are in reasonable positions, completely close the float valve spring, and the floats don't contact the jet block. As the picture above indicates, the 28.5mm setting produces a float height on my carbs where the casting circle is just visible beneath the float. Also, my floats were originally set quite a bit richer (only about half the casting circle visible). So...tap on those carbs and produce some vibration if you wet bench test them! I also recommend bench testing each carb independently before screwing them all back together. I made a lot of extra work for myself by first reassembling all four together and then needing to disconnect all of them to adjust the floats. Bonehead move.