From what I've been told, at the moment the 400 is limited to 12k rpm, which is pretty worthless because that's about as high as they go anyway. Peak power is at less than that, most people would shift before 12k anyway. They have a good amount more torque than the 300 and don't rev as high. On a separate note, what is up with the Twins guys?? 1:39s seems slow for those. They're running pretty much the same pace as the little bikes. I know a couple of those guys, like Perry and Madama, could throw down those same lap times on R3's. Is the FZ-07 that bad of a bike or what's the deal here??