Picked it up yesterday with the sidecar.
Its a Motorenwerk Cunewalde 2VD 8/8 - 2SVL which roughly translates into....
Its German which makes it very difficult for me to find info etc.
It was made in 1974
It is a V Twin
It is air cooled
800cc
3000rpm
Rated at 11.1kw or 15PS
It has a 80 by 80 mm bore stroke ratio which will probably mean more to some of you lot than to me (good/bad?).
It has a dynamo / alternator of unknown voltage and power, I'm guessing 12V and enough.
It has had two (second stage?) modification, 2SVL
It has a fan forced air cooling and ducting
It appears to have ally heads and crank housings with cast iron cylinders.
It weigh 124kg but unknown if this includes auxiliaries like alternator, fan, fuel tank etc
It wouldn't start without the glow plugs connected but fired right up with a squirt or two of easy start it revved and ticked over with no problems. From what I could see / hear there were no nasty sounds or other serious problems, but I could be wrong.
We ran it for about two mins and there was some white smoke similar to when it was cranking and not starting which didnt clear when running and I hope is not serious .
It was used to power the Multicar M 22 but mine was apparently connected to a generator.
Oh yea, the BMW engine had epic failure on the way home when one of the rocker arms snapped in half and left me stranded on the F1 starting line that is the exit of the Severn Bridge toll booths. Getting to the hard shoulder was like playing Frogger with a ball and chain on your foot!

Kubota Z482 which is plodding on with unnerving reliability. Three years so far.
1900 Diesel Bike being rebuilt with better clutch control.