I just joined up with ThumperTalk after reading posts for a couple of weeks. Purchased my first Thumper 1-1/2 months ago, a '02 WR426. Been a 2-stroker all my life (at least off-road) and decided to convert. Lovin' th WR and must say I am still learning the 4-stroke technique but now, after about 325 woods miles, it's coming together quite wonderfully. Oh, and the hill climbing attitude it has!! Will never return to the 2-stroke, except for "Novelty" only. Anyway, question is: What are the wires you guys are disconnecting? I assume that one is a rev-limiter, what is the other? I uncorked the bike, the airbox, exhaust and throttle stop, and am happy with the R's I get now, but it does seem to hit some sort of limiter at high RPM. Is it really safe to rev much higher? Any help is greatly appreciated. I already love the site/forum and hope I have some usefull input for you guys as well! Oh, and by the way, I do recall reading on Yamaha web site that the WR450 is about 6 lbs lighter that the '02. The link was removed a while back.