I was thinking of applying the "free mods" to my 03 WR 450. Are the ones listed for the 05-06 models good for the 03? I am also wanting to open up the exhaust, but the two main parks I ride in dont like loud bikes. are there any mods that are not too loud? I live and ride in cental Texas, 800-900 feet above sea level, average riding temp 70-95 degrees. Any tips as far as jetting is concerned. (I am convinced my bike is lean.) Thanks.