Looking for some help here. I'm restoring the 78 YZ100E I learned to ride on years ago and it's getting no spark. Here's what I've done: Replaced the ignition coil with a NOS that meets resistance specs. Checked all wires for continuity. I get continuity across the red and red/white wires from the magneto when I turn the motor over. I bought a CDI unit on eBay that is for a 79 model from a running bike. SO...here's my questions. Is that the proper way to check the coils in the magneto? Does anyone know if a 79 CDI will work on a 78 model?