Working on a top-end rebuild for an older Honda small bike? This is a genuine Honda OEM Exhaust Valve, part number 14721-176-000. It's a brand new, factory-original part, not aftermarket. It fits a huge range of models over many years, including the popular XR80R, XR100R, CRF80F, and CRF100F from the early 2000s back to the 70s, plus some Rebel 250s and other models. The list is long, so please check the detailed fitment list carefully to make sure it matches your specific bike's year and model. Using a real Honda valve ensures perfect fitment, proper heat tolerance, and reliable performance for your engine rebuild. If your old valve is burnt, bent, or worn, this is the right part to get it running strong again.