[QUOTE] My K100 (1983) went through a phase where the lights went out and the ignition cut randomly. This was the ignition switch causing the problems. It didn't however lose power, it was binary on or off.[/QUOTE] Oh, yes, I just re-read sweller's post properly. Lost power first. Hmm. Makes my suggestions seem rather unlikely. Still, if it happens again, wiggling the key while coasting wouldn't be difficult, and if it later refuses to start, swapping relays or fuses isn't usually that hard by the roadside. Maybe as has already been suggested, just a piece of crap momentarily clogging the main fuel feed.