i appoligize to all of you, i certain yamaha makes great bikes, i bought a 04 used and abused. so far i replaced the rear wheel bearings, both sprokets, chain, air filter, complete pivot works kit for the forks, fork springs .49, plastics front and back, everything in the clutch except basket it looked good, flywheel weight 5.5oz heavier, brake pads front and back fredo sintered, handle bars, grips, dr.d s.s. full system, probably other stuff as well. anyway i know i should of looked at it a lot more closer than i did before i said i'll buy it, hindsight 20/20 . now every now and then the kickstarter gets stuck and won't move right at the top. can't kick it over, it's locked, not all the time but when it does it's frustrating, then when i'm riding it's like the rear wheel is crooked, it doesn't track straight, like i'm fishtailing but not. i checked axle blocks, measured from the adjusting bolt back it's not that. then after all the work on the suspension somethings loose, you can feel it when you land from a 50' jump or so, it's not in the forks, i thought it qas the sterring head but thats all tight no movement, front axle and wheel bearings tight also. the only thing i noticed that the 10mm bolt at the top of the subframe is bent real bad. swingarm seems tight. i'm about ready to trade this thing in the dealers only offering $2300.- $2500.on a trade and they don't want another 04 yz450, they allready have some allready there trying to sell.i will say this the bike starts 1st or 2nd kick as long as the kick starter isn,t locked up. my 03 honda would of been through 2 set of valves by now.