The "Endurance" computer is not suitable for use on a dirtbike.....unless it never sees the dirt! I speak from experience. I just broke the 2nd one I've had on my WR450. They replaced the 1st in May of last year, the replacement just started acting weird. When I get moving the display turns to gibberish, it blanks, then random segments appear-nothing readable. Trail Tech was not encouraging on the phone, said to send it in, but they prob'ly won't do more than offer me a discount on a replacement.....after close to $130 after buying the computer and mounting kit, I am not happy!! I've had zero problems with my Endurance computer on my WR450.