I went from a 00' Wr400 to a 05' Wr450 and am sort of disappointed. I think my 400 has more hit than my new 450. What's up with that? Any suggestions. I am new to this site and I have seen the list of free mods, my question is do these mods require re-jetting? To be honest I am intimidated by the whole jetting concept. Is the stock jetting OK. I live in New Mexico, and probably do most of my riding from 5000-8500 ft in elevation. Anyone have jetting set for those altitudes willing to help me out. I love the Wr's I think I just need to wake this bike up. I am searching through old threads, but any help would be appreciated.