Street legal in the EU with DOT tires, turn signals etc. Pity these ATV derivatives (even lowered and wide track) in general are pretty crappy on the road from a handling point of view. Loads of fun though
Edit: Just saw that these quads are based on Chinese copies of Honda 250cc 4-strokes, churning out a whopping 17hp on paper...
Having some experience with theese Chinese engines and their specs I would say that you would be lucky to get 10hp+ on the rear wheels... of cource there are exeptions but I would not expect more than that.