Hi there

I've just dismantled the relay. It's basically two bog standard relays, three diodes and two resistors. All fine.  I had carried out the tests detailed in the Haynes manual, the most of which are continuity between certain pins. It failed a lot of them where it's "out your probes this way, you should see resistance. If you reverse the probes and get anything other than open circuit it's broke".

However it does it's job by supplying the correct 12v and the relays work too. Testing the diodes and resistors on the board revealed they were doing what they were supposed to be doing.

Relay:
https://ibb.co/XybG1t5

There was a wire off on the barrel when I got the bike, so I had to drill the security bolts out and resolder it. Barrel all fine.

Yes neutral light, it cranks, everything else works. As above all cutout switches work and are correct

I've ordered another CDI box today and on the hunt for a pickup coil but they aren't easy to find. That's about all I have left.

If I wave a screwdriver across the pickup coil whilst cranking it doesn't fire. The resistance only drops from 206ohms to 180ish too. It looks clean and fine but I suspect that's the issue

Hello, thanks for the reply.

Yes both terminals on the low tension side of the coils are getting 12v.

It appears everything is well except for the cdi unit discharging it's capacitors. To me, all that points to is either the pickup coil (could be wrong, I can't find anyone else's readings anywhere for a working one) or the cdi unit itself.

When spinning the starter the voltages at the low tension side never stray from 12v on the wires coming from the cdi unit.

However as I have two, the previous owner bought a new one to try and rectify the fault, I kind of saw it as a little unlikely. But never say never!

Does the main relay simply provide 12v to the CDI unit and that's it?