Serow CDI variants

I have a poorly Serow that runs completely out of power at quarter throttle. I checked the usual carb and valve clearances, flywheel etc, then found the CDI unit fastened together with insulating tape. Being super intelligent, I guessed that another CDI unit might be needed. My 1987 bike does not have an electric starter and the old CDI unit has only six wires. (Ref 2LN-MO 76F)

I bought a newer one for electric start models, (ref488 217 maybe, it is badly smudged), thinking I would just leave out the starter wires but the colour codes of the nine wires have apparently changed and I don't know where to shove the bullets. Any suggestions?

I have a Haynes manual for the XT225 but it is for machines that are five years newer than my bike. My frame is a 1KH, Japanese import. Just a pre-electric-starter wiring diagram would be welcome, I can figure it out from there.

Can anyone help, please?

Regards to all,

John