I rec'd a couple of emails about what this WZ thing is about, so I thought I would post what it is. Simple, really. Just a WR with YZ mods. The mods to call it a WZ are: 1.) YZ timing 2.) YZ / custom jetting. 3.) YZ seat/tank. Any brand is fine 4.) YZ rear fender and front plate. Rear panels are a bonus (makes the rear much thinner) 5.) YZ pipe or other performance pipe 6.) Remove other weight-remove kickstand, rear coolant res, odometer with cable and wheel gear (requires YZ wheel spacer) 7.) Of course you can't call it a WZ without removing the airbox lid and CUTTING the throttle stop. People ask "Why didn't you just buy a YZ?". The Wide ratio gearbox is what sold me. I could have saved some cash without having to buy all the plastic, pipe, etc. But the YZ gearbox does not suit me or my riding terrain well (except for the MX track, about 20% of time). The 18" rear wheel is something often overlooked, too. The 19's feel much firmer, and tend to break loose easier on off-camber surfaces. Also, that flywheel weight and kickstand are often blessed on the trail! When I do get a chance to ride a true YZ (about every month), I always seem to get about 100 yards before I want my WR back! Too damn stiff and too much clutch work needed in the tight.