I land speed race my Hayabusas at the El Mirage dry lakebed in the Mojave desert. Since I got my YZ400F going, I took it with me this weekend. My wife's uncle and I managed to do about 2 hours of riding and I have some questions. What can I do to the YZ400 to make it a better desert/trail bike? Is the YZ prone to heating up in slow-going? We were creeping through some slower rocky climbs and dried up rocky washes and the bike "smelled" hot and stalled and was difficult to start (starting has been reliable since I fixed the bike). I found myself wanting more top speed and a lower 1st gear. Also, the bike wallowed in the sand at high speed making for a nervous ride. Is the wallowing in sand not as bad on the WR? Sorry for all the questions - I am thinking that a WR would probably make a better mount for me but if I can put a few bolt-ons on the YZ to make it more tolerable on the trails, I would rather do that.