I spoke too soon, was stuck on the side of the road heading home from work today. Looks to be electrical, most likely a rubbed wire or bad ground. Luckily it's a kick start and I jumped the headlight wires already, just left the lights off and kicked it over to limp home. I had to Rev her like crazy when stopped at lights, only died one more time, but made it home. Looks like I'll be hunting down a short and rewiring over the winter.