'20 RXB250L - NC250 Motor Swap [Build Thread]

[franque]

That's really strange that the CDI passes the +12V to the ignition switch, are you sure that the CDI isn't receiving switched power from the ignition? Normally that's how they wire stuff... In any case, congratulations, I'm glad this came together!

[Ursa_Adv]

Originally Posted by franque

That's really strange that the CDI passes the +12V to the ignition switch, are you sure that the CDI isn't receiving switched power from the ignition? Normally that's how they wire stuff... In any case, congratulations, I'm glad this came together!

So yeah, my explanation was typed late at night and on my last trailing braincell. Probably not super clear. The CDI isn't passing power up to the switch. Just part of the whole circuit.

Battery > Engine Harness Positive 12v (red wire) > Ignition Switch > Black Wire 12v

The Black Wire 12v then splits into 1) CDI power and 2) starter button power.

So the CDI is getting switched power from the ignition key switch.