As mentioned in another thread, my 750 stranded me (actually twice), when the bike stalled and would then re-fire only to rev to 3500 and stall again. No loose wires, plenty of fuel. No starvation issues either -- no clogs in gas tank vent, petcock, fuel lines or carburetors. Note: the bike fired up fine after sitting overnight and failed after running approximately 100-140 miles.
Well, after much ruminating and trouble-shooting, I believe that the culprit is my Dyna 2000. I am replacing it with a regular Dyna S unit and then I'll run the piss out of the bike and see if I get a similar failure.