Re: Testing a coil and CDI Box?

[frankr]

Not knowing anything about this particular system, and going strictly by your test results on the coil, I would say the coil has a single secondary winding, with a plug wire coming off each end of the coil. That means that BOTH plugs fire at the same instant, and the electricity comes off one end of the coil, jumps one plug gap, travels through the block to the other plug, and jumps that gap, and back to the coil. So, you have to have a spark gap set up off both plugs wires when checking for spark. In other words, you can’t check for spark one plug at a time.

Assuming that’s the way the coil is constructed, that is.