I should preface this post by saying I've checked many previous posts to learn about converting a YZ450F into a trail bike. I do most of my riding in the Cascade Mountains in Washington. Lots of elevation gain and some pretty steep trails... My XR400 is perfect out here. My unique situation is that I took in a 2004 YZ450F as part of a business deal. The bike is flawless with less than 10hrs on it. It was just sitting in storage all these years... I could sink $$ into it by changing the sprockets, changing the exhaust, putting weight on the flywheel, changing the gears... The list could grow. I'd rather be sitting here with a WR in the same condition, but that will probably be impossible to find. Is it worth it to sell or can I get a good bike through trade? Any suggestions?