I've got a CR250, professionally ported. When I race my buddy on his '01 XR650 (power up mods done, and W.B. exhaust) I beat him by about a bike length halfway through 5th (then he's gone). When I race him on his xr and i'm on my '00 WR400 it's dead even up to about 65mph. He's 25 lbs heavier than me, though. My throttle stop is removed, FMF power bomb header, FMF power core muffler, twin air, Michelin on rear. The mj is too lean also; i'm waiting on the jet so it should be faster out of the hole. So there you have it for those who care.