Background. I have 1996 KX250. I was riding in Hollister. So I broke the axle block adjuster bolt twice on the left side. The head snapped off the first one, The second bent. Both times sending my rear tire into the swing arm(crooked of course) bending or breaking teeth off of the sprokets and I will probibly need a new chain guide. The damaged bolts also damaged the axle adjuster block on that side. First question. Does anyone make any aftermarket axle blocks for a bike this old? 2nd. Would landing under power be casuing my bolt problems? Or could it have just been a fluke? An old fatigued bolt being replaced by a sub par afternarket one (I got at the park store) holding what was probibly an already damaged block. 3rd. I now need new rear wheel bearings. OEM or aftermarket?