I've got a 95 650C with a little over 44,000 miles on it. 28,000 after rebuilding the top end courtesy of two failed OEM cam chain tensioners ruining the cam chains. That's the only really weak link, as you might guess by my mileage. The bike is great if you either do a lot of road riding as well as dirt/gravel roads. In the east here it's a bit big for a smaller rider like me when in the tight woods trails we have. Seems really popular in areas where the riding is a bit more open with fire roads and such.
Fact is I make and sell the tensioners now due to demand and the fact that no one else lists them for the KLX and a number of other models like the Zephyr that I also have. I am a moderator at the Yahoo KLX650 group and I invite you over if you've not been there yet.