Good point. For a long long time no one knew if it was just a rumour until someone finally found it in boxes. The guy who put it together must have incredible skills. Hard to imagine.
Here's one of my favorites; an Italian 350 I can't remember the name of. The name is on the side if anyone can read it. Moto -something. Very innovative, and like the R7, proved too expensive to build- no one would be crazy enough to spend all the money.
An example; see those black rubber do-nuts around the rims? The chassis is suspended on those rubbers rings. That's instead of shocks.