I ride an 01 YZ426F and love the way it makes it's power - what most people complain about. I love the abrupt 2-stroke-like on/off power delivery that yamaha worked so hard to smooth out over the years. My friends' CRFs and the only yami 450 I have ridden (05) feel like an XR250 in comparison to my 426, as far as delivery goes. Any way to make say an 06-08 450 run with the aggressive, arm ripping power of my 426? Anyone know what they changed over time to smooth out the power delivery? I assume it's mostly ignition mapping and carb setup. I wanna stay true to blue as far as my thumpers go but this has been holding me back for 4 years now from replacing the 426!