IIRC, this scooter is somewhat revolutionary, and may well change bike riding completely.
It uses a 2 stroke direct injection engine, traditionally 2-strokes are badly behaved on emissions, this is not, because the scourge of these engines is that the incoming fuel air mixture is only held in place by a back pressure wave from the exhaust, but this is only truly effective at certain engine speeds, and the rest of the time there is a lot of unburnt fuel going out the pipe.
Somehow the fuel is injected when the piston has closed the ports, I think there is a premix stage in a seperate chamber where fuel air is mixed to a certain degree, and this mixture is then sent into the combustion chamber.
I believe that there is a possiblity of scaling up the size of this engine dramtically, so that you could get effectively a 2 stroke 1000cc engine with much better fuel consumption and better emissions than a 4 stroke. They have shown a mock up of a 500cc scooter.
I think this engine is used in jet skis, or something like it.
This engine has been in development for a few years not, I can only guess that scaling up the engine size is not quite as straightforward as was first mooted.
I do rember the Bimota 2 stroke injection project that was a disaster and had much to do with that companys’ demise.