PIVOT WORKS SWINGARM BEARING KIT INCLUDES GREASE YAMAHA WR250F WR450F YZ250 F FX X YZ450F XAn ill performing swingarm can lead to a loss of action and handling in your rear suspension. However, Pivot Works can restore that handling and action in one complete, low priced swing arm kit. Each kit features all of the needle bearings, pins, seals, caps, collars, and bushings your ride requires for a smooth traveling swingarm. All parts are of OE quality or better and at a fraction of the OE price.