250-500cc Ive managed to cook the ignition on my wr250

The guy who previously owned my husky wr250 06 cut out every non essential electrical system in the bike and I've been rewiring the lights ect to get it road legal again. Unfortunately I've done something to the ignition system as it isn't sparking anymore, and I fear that I've shorted my 12v tester battery (motorbike ) onto the frame accidentally.

What parts have I killed? I'm picturing cdi/coil? The spark plug is fine, also tested the lead and it's all good.

Thanks!

start with the basics
unplug everything and see if you get any power from the mag ignition lead
sometimes it's as stupid as a kill button gone bad

Ok great. I've got through the wiring harness with my trusty multimeter and I can see that the CD I is producing no current. The current is good until here. Is replacing this a good start?

so you have power coming from the ignition side, not the lighting side?

Power from the generator to the cdi when I kick it, but nothing on the cdi output. Tells me it might be cactus!