I have searched everywhere, and have still not yet found a good write up on how to rebuild my xr200 rear shock. It is a 91 and has the hose and remote reservoir. It is ment to be rebuildable. My dad is an engineer so we have the tools and means. I will also be doing a 85 XR250 Rear shock as well. But I think they are pritty much the same. Do I need to replace the Nitrogen Bladder?? or don't they wear out much?? Cheers.