This purchase is for a pair engine case covers for above bike models. The covers are made of UHMW-PE (ultra high molecular weight polyethylene), a tough plastic with good strength, wear resistance and dimensional stability. It is more dimensional stable than Nylon and used in many industrial ball bearing and friction reducing applications. They can be inexpensively replaced in case of a low-side. The bolts are made of highest grade commercially available 12.9 (177,000 psi in tensile strength). Rest assured that you are getting the best material and fully thought out product.
