This rear shock is definately not what is supposed to be on my 1989 KX500. I have no idea what kind it is, or even if it is the right size and spring rate. What I do know is that there is absolutely no nitrogen pressure in it at all. There are many aftermarket parts on my bike from a previous owner...FMF gnarly desert pipe, desert tank, FMF powercore muffler, boyesen two stage reeds, and probably aftermarket piston (I havent gotten it apart that far yet). There is evidence that the original shock broke and caused some scars on the rear part of the frame and swingarm, but nothing that would cause problems. If anyone knows what this shock could be off of, it would help a lot since it needs a rebuild, if its even worth it. I may just have to get a proper shock and respring it for my butt weight. I also hate the way the reservoir is hose clamped to the subframe.
Oh yeah, keep an eye out, I am doing a frame-off rebuild and will be posting up some pics of my progress.