YZ450F and YZ450FX Valve bucket tappet 4 pack. Fits 2010-2017 plus many other machines that use 24.5mm and 26.5mm buckets. Heat treated and precision ground steel with laser etched size for easy identification. Condition is new. These are reasonably priced alternates to the expensive factory buckets. First class USPS shipping. Thousands sold without a single defect. Yes I offer a 90 day warranty. Satisfaction guaranteed or your money back.