Hey guys, I need some help. I checked the archives, but didn't find anything on this. I have a Y2K WR4 with about 700 miles on it. The problem I'm having is a very noticeable vibration at a certain rpm. I haven't checked with a tach, but I'm guessing it's occurring somewhere in the range of 4000 to 5000 rpms. The vibration goes away with any minor change in engine rpm, so it is occuring at a very specific rpm (doesn't matter if bike is moving or not). The vibration is very noticeable in the handlebars, and will even cause minor numbness in my hands if I keep it at the specific rpm. I don't think this is normal, and wondered if anyone else has experienced this. Rode my buddy's '99 WR, and noticed nothing like this. Thanks for any help. -Tim 2000 WR4, Stock Exhaust with Vortip, Airbox Lid Removed, No Throttle Restrictor (CAN Bike), 170 MJ/45 PJ/#4 Clip/1.75 Turns/ Elev. 500' to 6000'