Yamaha YZF/FX/WRF Pro-Pack. Yamaha Four-Stroke Pro-Packs. Four Stroke Yamaha Pro-Pack for the 2014 - 2023 model years. This kit contains the standard Pro Pack hardware components riders and mechanics have come to rely on, as well as all plastics bushings and fasteners, oil filter cover and strainer O-rings, DZUS eliminator system and much more. Fits 2023 YZ450F and 2024 YZ450-F, YZ450FX, WR450F, YZ250F 2024 - current YZ250F, 2023 - current YZ450F, 2024 - current YZ450FX, 2024 - current WR450F. Four Stroke Yamaha Pro-Pack for the current generation models. This kit contains the standard Pro Pack hardware components riders and mechanics have come to rely on, as well as all aluminum bushings and fasteners, oil filter cover and strainer O-rings. Fits 2023 YZ450F and 2024 YZ450-F, YZ450FX, 2024 - current YZ250F, 2024 - current YZ450FX, 2024 - current WR450F.