I just bought this bike a couple months ago and have done all the free mods and a JD Jetting kit. I'm used to my old '96 RM250 W/10oz flywheel weight, so the WR450 seems pretty mild even though it has a lot more torque. I'm thinking about trying either the YZ cam or a Hot Cam. Which has the best mid/top end? Anyone have any links to a site that shows how to swap the cams? Will I have to adjust the valves any or is it just an easy swap? Thanks, Matt.