I have a Vulcan 750 that has been running great, up til today. After a 30-40 mile ride, I came to a stop sign, and the rear cylinder cut out. When I took off, it kicked back in around 2,500 rpm. It continued to do it all the way home - it kicks out when it drops below 2,000 or so RPM. I checked fuel lines, vacuum lines, it seems to have good spark, sprayed carb cleaner around to see if it was sucking air anywhere and it isn't. I am running out of ideas. It runs fine once it gets to 2,500 rpm and the rear cylinder kicks in, but I can't figure out why it won't run on that cylinder at low RPM. Any suggestions??? Thanks.
jmtp79
Sounds like a spark problem to me as well. The old KZ1300 6 cylinders were prone to the very same thing. They would develop cracks in the coils that caused it.
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