KDX 200 SR CDI Problem

I bought an old SR model KDX which has never run right.

The engine has been re-built and the Carb. replaced but it still runs like a dog.

It is OK at low rpm and missing badly at full throttle. There is a lot of unburnt oil and fuel in the exhaust.

I have tried re-jetting and plug chop, the spark plug color is fine.

I believe the CDI may be at fault, but cannot find a replacement.

Worryingly the CDI is different from that shown on any diagrams I can find (KDX 200 89/94 manual or KDX 200 F1).

The CDI wires are:

Red + white (to stator coil)
Black

Black + yellow (to Ground)

Blue (to ignition coil and grounded by kill switch)

black + white


I have no idea what to do next.

Thanks

Firstly thank you, I was feeling more than a little lost.

I live in Thailand spares parts and qualified mechanics are rare.

I have elimated the following.

1. spark plug (new)
2. ignition coil (swapped)
3. stator coils (resistance close to spec) 30V at tick over.

I have yet to check for ground short circuit faults, (very good idea.)

I do not have access to spare CDI but may have found one on ebay.

In the workshop manual it shows a special tool to check spark strength the spark should jump a 6mm gap.

My local mechanic removed the spark plug cap from the high volatage wire, then held the high voltage wire a few mm from frame and kicked it over.

His hair stayed flat ot his head and the spark jumped the gap.