Open mag side, pull 4 screws out, remove magneto. Check to make sure that black wire is properly seated against magneto...
I had a kit once that ate 3 cdis
Was bad ground wire...
Since then, I've always resoldered new heavier guage wire in place of supplied wires. New ground strap, tucked behind mag upon install, instead of on front. Automotive goop at wire exit hole
Then, as mentioned previously, solder and shrink connections.
If still not working correctly, buy a moped...lol