THIS SHOULD WORK ON ANY QA50THEY MEASURE TOP TO BOTTOM 48.31 MMOUTSIDE FACE OF VALVE 16.03 MMAND STEM IS 5.46 MMAND THEY ARE MAGNETIC 1EA NEW AFTERMARKET HONDA QA50 ALL EXHAUST VALVE REF 14721-081-020 (AFT209G)SKU: AFT209G$36.88PriceQuantity*Add to Cart