According to Yamaha, the new WR250R/X is supposed to put out a little more than 30 kW, which is equivalent to 40 hp. That's as much as my WR400 puts out. Not bad for a 250. If they can scale up a 450 with the same power/cc, lighten it up and give it a decent suspension system, I'm all over it. Weight may not be an issue because a little post-purchase fat trimming may do the trick. I do have a feeling though that I will be disappointed with the WR450R, especially regarding lack of suspension travel and ground clearance.