So, my Honda C100 has an ongoing issue with a misfire and eventual breakdown when it warms up. I’ve replaced the entire magneto assembly with a CDI conversion to eliminate the points and condensor, but the problem still existed. I then decided that I would replace the ignition coil, HT lead and spark plug cap.

Yesterday, after fitting the new coil, HT lead, and spark plug cap I took it for a test ride and the problem still exists 🙁

Now I’m wondering if the ignition switch is faulty or the loom has an issue.

The next step is to “hotwire” the ignition switch and see if the problem is still there.

If that makes no difference I think it will be having a complete new wiring loom.