These axles are a direct OEM replacement for YZ/F 125-450 Rear Axles. They fit model years YZ 125/250 1999-2023 and YZ 250F/450F 1999-2008. These rear axles are shot peened and heat treated to a Min.UTS 160Ksi. for increased fatigue resistance. They are also PVD hardcoated to reduce galling.
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