Indeed the plastics and fenders are different on the aluminum models. But if you prefer the look of the '06 YZF rear fender, it is possible to make it fit to your bike. Of course you will have to cut a part of both of the fenders ('00 and '06) and make two small iron bases. I have done this trick to my '03 WRF450 and looks great. If you are interested i can post some pics.