I only rated this a 4 just because it feels a little flimsy. However, this is the second one I've purchased (on 2 different bikes) and do not have any complaints. The first I had on a YZF426 and it never failed me so I bought another for my YZF450. Although it feels flimsy, it has never let me down in protection from rocks and it looks bad a** with the other Light Speed CF peices that I have purchased (skid plate, chain block, front brake disc cover, rear brake and rotor). Saves a little weight and looks and performs great!