After 3 months in the shadows I have the MotoPed in the bay and the engine in.
I re-watched the dated assembly instruction videos and had to smile.
I built the whole frame up to pedaling first then we mounted the engine which was a snap, it's just 2 bolts.
We just slid it under the bike on a little ice chest and tilted it so not a grunt was heard ;-}
Lot's of work still to do but at least it looks like something now.