It's a Suzuki B-King....basically a naked Hayabusa that was a "sensation" when the supercharged concept / prototype was first shown but a disappointment when actually launched without the blower.

Quietly dropped by Suzuki after a few years but now sought after by a few power-crazy aficionados.

The bike in the photos has a very non-standard swinging arm and lacks the bizarre over the top death-ray-gun style original silencers (in fact all the styling was in questionable taste).

I hasten to add I only know about these as the husband of a friend of my wife has one in Portugal