I once had a G-Force axle on a Z400, and could not keep the hubs tight on it. Torqued them to factory spec, and they would loosen up about every other ride. Seemed like once the splines started wearing, it was a losing battle. Then the center nut started getting loose. That experience kinda made me leery of them.why not spend the extra 50 bucks and get something thats tried a proven?