Cutting out at high rpm?
I've noticed this recently when revving out my 07 ZX10R, so far I've only had it happen in first and second (probably due to the speeds I'd be doing in the higher gears).
It get's to around 10,000rpm and the power will suddenly cut out for a split second, before kicking back in. It's like you're going flat out and then it feels like a sudden grab of the brakes, before it kicks back in again. And flat out in first it scares the sh*t out of ya!
I'm thinking a loose sensor somewhere on the bike, or even the plugs?