So, Forchetto, that answers the question about which engine--you guessed correctly--the Loncin liquid-cooled 250. Since Pitster Pro has started importing the Puzey, that engine is already US EPA certified, although the Puzey is rated at 25 hp.

gp, I don't know if there will be any clones--CPI has sold it's GTR scooter here in the US, and it has a definite original, classy look to it, like the Megellis, and no one copied it. Come to think of it, in a way, the Megellis almost look like they copied the CPI's a bit, but not in a bad way

Also, the link you posted, Forchetto, has a youtube video I found of a guy riding the motard in 125cc form, and if you put in 'megelli' there are other videos of the other bikes in action, albeit in 125 form, and not the anticipated 250cc models.