I've been riding a 92 WR500 for a while now. Brand new the bike was terrible but I went through the engine and suspension and now it is a nice little tractor on the hills here in Colorado. I was happy with it until I rode a 98 Gas Gas EC 250. In the 30 minutes I was on that bike I've had more fun than all the years on my 500 combined. It turned me into a maniac instead of someone who just putts along the trail on a tractor. I decided I want one. BUT I've always loved 4 strokes. The thought of a 2 stroke like 4 stroke really appeals to me. I've never ridden the WR 400 so I wonder how it would compare to a Gas Gas 250. Any comments??