There was a large redesign of the entire bike since past models as far as frame, suspension, motor, and just about everything else. This bike has far more torque than that of the 05-06 models produced, as well as what seems to be suspension far more fit for a lighter rider such as myself (155lbs).
I'm at an intermediate (B class) level of racing, and the suspension is quite fitting for me once the sag has correctly been set for my weight. Of course larger riders will probably have to revalve or respring the suspension. The fact that the motor is so much more powerful will allow heavier (vet) riders, to ride the lighter 250f, while still having the power needed to get them around the track.
This is a large improvement over earlier models.