First of all I want to say hi and from the looks of it this place seems to be really helpful. I've been on sport quads for about 10 years with plenty of dirtbike experience, just no ownership. I just bought a yz400f Tuesday and am looking for any advice you all are willing to give. Its got a K&N filter and PC T4. I'm still gonna check on the jetting, its got a little pop on decel so I might go up on the pilot. I also have a few questions. - Can I adjust seat height by reducing the preload on the rear shock? If so, how much. I'm 5'10" and a couple inches would make a world of difference. I'm mainly gonna be on trails and the previous owner was always at the track, so I'm not worried about it being too soft. - How long can I expect to run on a tank of fuel at a medium pace (fire roads)? Should I look into an oversized tank? - Do you guys recommend any decomp cam over another (yz450 vs hotcam...etc)? I've got the drill down, but it seems the cam will make it much easier starting. - What other recommendations do you have? I love the power of this machine and can't wait to get better acquainted with it. Here's a few pics Thanks!