New guy here, my first post, I have had two 426 yzf's and three 450crf in the last six years, bought the 06 yzf 450 YELLOW a month ago and the first time I rode it I liked it but didn't love it. I have ridden the bike four times ( about eight hours) and I can honestly say I love this bike ))))))))))))))))))))) The motor does not hit as hard as a crf, but it does have a bunch more bottom end and it really doesn't care what gear it's in. The pilot jet must be changed, no big deal, I lowered the pegs, raised the bars and I have left the suspension alone, 6'5" 240lbs, expert senior dez rider. Just played with the sag a little, bike is a lot more stable than the crf, starts good/bump starts good/top end is good/air cleaner is easy compared to crf. All in all I would recommend the yzf over the crf for 06, the suspension is so good it makes your you know what hard )) And trust me, I have been true blue honda for more years than I want to say .