Your reply is appreciated, Bonanza -
I managed to get the carbs into the spigots on the engine side using the stout oak handle on my trusty wire brush to lever the carbs forward. Lubing up the rubber spigots with silicone grease helped a lot. But the air cleaner side is still a no-go. Don't ask how many little holes are now in my hands from the steel wires in the brush.
I never had this big a problem with my old bike, a 1980 Yamaha 850 (well, it did have one less cylinder), and I had those carbs off and on about a dozen times while trying to repair the original Hitachis and finally while repairing and rejetting a sad set of replacement Mikunis off a 750 Yamaha Triple. In the end, it was really worth the effort because the thing ran better than new and I learned a LOT about refurbing Mikuni carbs.
The need to have this running fine by April 1st caused me to give up doing the repairs on the big Bandit myself. In the past, I'd have thought of this as a challenge and kept at it until the problems were fixed . . . must be getting old.
So I'm sending the Bandit to the local stealer to find the solution to this problem and the other problems the bike has, such as backfiring (maybe a vacuum leak or two), banging loudly out of the exhaust when I turn the engine off (when it runs at all) and missing occasionally. These all sound like a lean condition, or a vacuum leak, don't they?
The carbs are clean and repaired, so hopefully the stealer won't stick it to me too hard. The pilot screws are all at 3 turns out now. They were set between 1 to 2-1/2 turns for reasons known only to Suzuki. I liked what I read on site about using starter fluid to find vacuum leaks, but time is too short to fool around with this anymore.
Thanks for lending a hand with your advice.