"Your jumping the gun on the C
"Your jumping the gun on the CD. Literally anything in the ignition system can cause a loss of spark. Exciter coil, trigger coil, kill switch, ignition switch, wiring, fuse, bad ground and the CD. You have to whip out the service manual and test the various parts and eliminate them one by one. Or you can roll the dice and start randomly buying and changing out the parts. The CD is the most expensive, but since the trigger coil and exciter coil are no longer available I would not suggest you buy a non returnable CD and then find out you need an exciter coil and had a bad ground. If you don't have a manual and don't want to buy one your best choice choice would be to take the engine into a dealer and let them troubleshoot it for you."