This one has a mind of it's own.
Sorry for the lapse. Went riding on the gs and had no time lately between work and chores.
So I did what you suggested and tested the wires and plugs by swapping a good one for the problem child. I was able to isolate the #1 wire as the culprit and found a replacement for the #1 plug wire and swapped it out. Started right up. So plugs are fine, wires too and the fuel pump is doing its thing. Cracked the throttle in neutral and it revved up and back to idle. Stopped it. Started it and all seemed ok. Put all the covers back on and took a ride around the block. Then stopped and restarted. Went for a longer ride and stopped to find the same problem happening. Cranking, pumping but not starting. Did an inspection on the bike and the only thing wrong was the rear brake light switch was not firing the rear brake light. Front brake switch works fine so the bulb is good. Could this be related?
I've read the posts from the first..
And as an old 85 KRS owner - I have to ask....have you checked that under tank connector? Known problem design and by 2012 this part is often loosened up enough that the male pin, female sleeve connections are just loose. When the bike next stops, reach under the tank, jiggle this connector and try and restart.
If this is the problem - simply reseating the connector will not permanently fix the problem. Search the forum to see what others have done to replace this plug.