It's alive!!! Just.
Thursday I got a few hours in the shed - and on the back of an awesome day at school it was loads better than a drink or two to celebrate. The engine was a long block when I started, by the end of it I tried to fire it up - which it tried but kept dying. I figured I needed a fresh battery or a jumpstart and some good fuel.
Today was that chance. I quickly worked out that there was an issue with the ignition as it would fire up then die when I disengaged the starter motor. By holding the edge of the starter switch I could keep it running - it was bloody rough but it ran. Then I smoked the shed out

So I took it outside and did the same to the back yard. I was a bit disappointed as there was so much smoke it was pretty consistent - I was imagining stuffed oil rings but it eventually came good. Now the issue is that it's running so rough. If I remove cylinders 2 and 4 from the dizzy it runs the same. I've swapped spark plugs and leads over without any change in performance.
Now I'm going to mess around with valve clearances to see if I can get it to run on both sides of the engine...
I've also checked the firing order for the EA81 - 1, 3, 2, 4 - dizzy rotor moves in an anticlockwise direction

Cheers
Bennie