My first reflex when I saw the original question was to respond with a question: "How does a pig play a violin?" That's not altogether fair, of course, but the YZ450F is certainly out of its element as a woods bike. The suspension is stiff, the engine is too cantankerous, the rear wheel is wrong, and the gear box is a close ratio setup. It is light, and is workable, but you do have to make some changes to get it to work well. IMO, the only reason to go with a YZ instead of a WR is if you're buying used. YZ's are a lot easier to find good examples of, and usually less expensive. But if you're buying new, there will be a lot less expense involved in getting more power from the WR engine than in correcting the shortcomings of a YZ to suit the role really well. I totally forgot.about the WR. The new wr250 is supposed to be one heck of an offroad machine. Plus it looks identical to the yz-50f. Couldnt go wrong choosing one for a woods bike.