Did some searches on this topic, but didn't turn up as much information as I'd like, so thought I'd try a post. My riding bud has a '04 YZ450F and is experiencing some front end push and isn't quite as happy with the handling of his '04 as he was with his '00 426 (personally, I think the '04 is a much better bike all the way around, except for some front end pushing). His 426 had Factory Connection suspension revalving, so I think that is why he liked it better. Thought I'd see what kind of suspension mods anyone has made and how it affected handling, then pass it on to him. He also had major neck surgery and then surgery again because of a infection in the incission, so he's still a little out of synch, but he's usually a fast intermediate who likes to jump and ride at high speeds. Thanks!