I recently purchased a 02 WR426, and have found this site. I tried to search through the files, for all the posative mods I can make. I see I can retard my exhaust cam one tooth and get more mid and upper. Problem is the technical link in this site, that would explain this procedure doesn't exist. Same problem for this BK mod, or grey wire. Next issue that chaps me is the carb jetting. All I find is lots of specs for the 400 and little for the 426. The best I can guess from searching is MJ158, MAJ-160, Needle DMM or EMM, APJ-.024, PJ-35, SJ-60, Throttle stop cut, Air box lid off, grey wire cut. Looking into my manual I see no listing for these two needles, and they don't list such a low PJ. This makes me gun shy, on making these changes. I have attempted searching through the files, yet I find little on the 02 WR426.