It seems someone is always asking about doing this. As far as the rear fender goes, Acerbis offers a YZ replacement fender that has either the cutouts for the WR overflow tank already present, or has outlines of where to make the cuts. I think Cycra and Polisport also offer them. The easiest way to make a YZ front number plate fit properly is to get a stock YZ or YZF top triple clamp off of eBay. The '03-'05 are interchangeable and may even fit earlier years. I came up with a better way to wire the ignition and get rid of the WR's ridiculous on/off switch and LED by using the run/stop/start switch from a TTR250. (Factory cost: $34.) The switch hasn't changed since 1997. The advantage here is you can get rid of the left side kill switch and now when you turn off the engine with the run/stop switch you also kill the battery circuit and no longer have to worry about draining it dead. I also made a plate to mount my TrailTech computer, but it mounts off the bar clamp instead of the triple tree. It's pretty well protected. I put a 12V red indicator light ($1.59 at Radio Shack) on the plate to indicate when the battery circuit is on (like the stock LED), but it isn't really necessary. Here are pics showing my mods. http://i3.photobucket.com/albums/y67/RADRick1/WR2YZ004.jpg http://i3.photobucket.com/albums/y67/RADRick1/WR2YZ001.jpg http://i3.photobucket.com/albums/y67/RADRick1/WR2YZ003.jpg I've since swapped out the YZ top clamp for an aftermarket one, and I converted the stupid loopy stock WR brake line to a CR-style braided line, which resulted in a much cleaner MX look. http://i3.photobucket.com/albums/y67/RADRick1/WR2YZ005.jpg http://i3.photobucket.com/albums/y67/RADRick1/WR2YZ1.jpg Even with the WR graphics on the shrouds, I still get double looks from people when I hit the magic button, especially at the track. I kept the stock WR top clamp and brackets so I can easily remount the headlight if I want. Since the TrailTech is not mounted off the top clamp and the bracket-mounted wire loom is now gone, swapping back and forth is a breeze. Enjoy.