No Spark

[steveloomis]

I just wanted to pass on a recent find by someone I was assisting with no spark. We went thru all the Ohm checks of the stator and trigger coils, ignition coil. We measured ac voltage on each coil output and still no spark. Bike owner was about ready to order a new CDI and decided to just clean up his wiring harness. He untaped it around the coil area etc and got to the main harness. He found the black wire that is bolted to ground had broken off and was not attached to the harness. Most of these bike have a single point ground. One he fixed the problems, he went further into the harness and cleaned up other potential ground problems, he now has spark. Lesson learned.

So, if you have a no spark condition and everything else checks, verify that the ground is good. What I'd do is find a place or two on the solid black wire and add more grounds to the frame. make sure you scrape the paint off or rust off the bolt and ground away.

Steve