Upgrade your Bagger Legs. American Suspension Race series fork legs use the proprietary MOS2X coating. MOS2X elimates stickion and creates the slipperiest surface imaginable for the fork bushing to ride on. This space age coating makes small bumps in the road seem to disappear. MOS2X is a surface engineering tribological coating used on Aircraft aluminum in specialized racing vehicles to reduce friction and insure long life. Also includees fender and brake mounts. *Street or track, noting beats MOS2X.