2002 - 2021 YZ 125cc and 250cc: Bolt's Two-Stroke Pro-Pack for first generation YZ125/250 contains factory style hardware for all body work, aluminum bushings, rotor bolts, a full set of sprocket bolts, Fuji lock nuts, and drain plug washers. Also includes all the external fasteners for the engine. Organized container includes a placement guide to ensure proper fitment. Equally useful for older models and more recent models. 2022 - current YZ 125cc and 250cc: Bolt's Two-Stroke Pro-Pack for current generation YZ125/250 contains factory style hardware for all body work, all the external fasteners for the engine aluminum bushings, clip nuts, rotor bolts, a full set of sprocket bolts, Fuji lock nuts, and drain plug washers. Organized container includes a placement guide to ensure proper fitment.