I am buying a used 03 WR450 and have been looking at numerous items to buy simply because I have never bought into the theory, "If it aint broke don't fix it". My theory is "If you got extra money you don't have enough crap". I want some opinions on a few items. W.E.R. vs Scotts vs GPR damper's Power Now Valves YZ seats vs WR seats. Baja Designs vs Trick Dual SPort Kits Also is the stock WR pipe different than the YZ pipe? I am sure I will have more questions later.