I finally got my 1997 Vulcan 750 going, everything is pretty much done, including 4 new NGK spark plugs. It was running fine. I went for about a 60 mile ride, stopped at a fast food place, and when I started to leave, it would not start. It fired a couple of times, but that was it. I ran the new battery down. Finally a guy showed up with jumper cables, and I got it started after several minutes. I rode it back home, and it ran fine. I shut it down, and restarted it several times. Today I went to start it and ran into the same thing. It just would not start. I had jumper cables attached to it, so I had unlimited current. It just would not start. Plenty of spark, and the float bowls were full. I finally gave up. I only ran the starter for about 3 seconds at the time to avoid overheating it. Tried it with and without the choke. Nothing. I have had starting problems with Vulcan 750s before, and know it is a common problem. But I have never had one completely refuse to start after several minutes of firing. Cranking sounded normal. When it was running it idled fine and I hit 80 mph on the freeway with no problem. Very smooth, no misfiring. I have been starting and warming up the engine every couple of weeks since I bought it. It never refused to start. Any ideas?