I'd say he's a liar. And a bad one at that. I ride a GSXR 1000 and it won't come up at 120 mph. It will at 90, (clutched, in 3rd) but that's about it. Maybe if he's got it punched out to 800cc, turbo kit and nitrous, and hits a good little rise in the road and yanks real hard on the handlebars while standing on the rear pegs.......I sorta doubt he's doing all that, though. I'd have to say he's full of shit.