I'd love to do something with the suspension on my GPX250R; it's pretty common knowledge it's way too soft on these and not adjustable. I'm mostly interested in just doing the rear for now because that looks like something I could actually do myself, but if I'm making the back stiffer and leaving the front stock is this going to be bad/dangerous for handling? I will be doing the front sometime down the line but right now I don't feel mechanically confident enough to do it myself. Also would this: KAWASAKI NINJA 250R EX250J REAR SHOCK GOOD COND bolt straight in? And is it adjustable?