got ur attention?. i'm looking at purchasing a yz450 as a very aggresive single track bike, but i also enjoy making longer trips through the wooded trail in michigan. my main questions are there anyyears to stay away from? whats the good and the bad. and please be honest. Mostly trail riding do i have to buy an 06 or newer to have the 5 speed transmission or is a 4speed just fine. everyother bike/quad i've owned has either been a 6 or a 5 speed. are these bikes like the crf450 where you have to constantly do valves or are they reliable? how do they hold up for reliability... assuming it has exceptional maintence with nothing more than a pipe/filter/jet for mods basically i'm looking for a good fun fast bike without having to wrench all the time. i'm sick of adjusting valves in the middle of the trail, or even worse being stranded in the middle of nowhere. i'm really curious to hear the owners opinions.. this bike may be ridden slightly on some smaller moto tracks but that has absolutly no bearing on its inteded purpose... i'm looking dollars per smiles and would buy a 2t but the fuel milage/range would hurt me not to mention the torque of a thumper is nice in the trail.. I wanna go fast, and not have to wrench all the time.. i've posted a post in what bike should i buy but noone there seems to respond.. not to be short but its all explained here, and i am particularly interested in the yz... basically because i've heard the old 426 was a benchmark in reliability, and not too many other complaints... http://www.thumpertalk.com/forum/showthread.php?t=730880 someone care to school me??