I have an interesting but frustratingly anoying issue with my 1991 pre div.
Its been a slow decline and here is what I know
The battery is good
The starter motor works (the bike turns over)
Fuel is present
There is no spark in any cylinder
The CDI box has been tested and is OK
There is power to the coils and they test ok
Sometimes it starts... But this is all but non existent now.
The bike is dry so no water getting in anywhere.
I've checked all the connectors I can see and they seem fine.
I'm at a loss and any help would be greatly appreciated, also info on how to test things as I'm fairly new to bikes.

Many thanks