I just bought a 1983 Suzuki GS750E. I rode it home 115 miles with no problems, and then went to start it the following day and got nothing from the key turn. No lights, no gauges, no sounds, nothing. I checked the battery, and the kill and start switches-- they passed a continuity test. All the fuses including the main fuse are apparently intact. The bike will turn on once in a while when I try the key, but it dies out again completely if I toggle the kill switch or hit the start button (the starter makes one click as the bike shuts off).
I believe the problem to be in my starter system, and according to my service manual, the only things in the system I haven't checked are the ignition switch, the starter, and the starter relay. Can one of these things cause these symptoms? I suspect the ignition switch is faulty because it was a little picky about not being turned too far, before the problem. How do I test this? What else do you think it might be?