Neat, however, photos are too far away for my old tired eyes to see any details.
I guess I'll have to believe you, but, it's hard to tell if that's just a cylinder and head sitting on top of the engine case (are you pulling our collective legs?), or if it's all real?

If it's real... I'd be interested in knowing how the cam chain(s) operate, one chain for both cams or two chains, one for each head (and how that would work)?
And, how do the piston connecting rods to the crank case fit in there? I don't remember a lot of extra space on the crank for two connecting rods?
Just curious, I guess.

Paved roads, just more needless government spending...

I pick up my mail in Santa Barbara, California, USA.