Orange Cycle Parts Air Filter for Honda CRF 50F Dirtbike MX 2004-2017 replaces OEM# 17211-165-730 Designed to fit in the factory air box exactly like the original filter. Un-Oiled Single Stage foam traps even the smallest dust and dirt particles Engineered for maximum horsepower and protection Honda CRF 50F 2004 - 2017 Air Filter Replaces Honda OEM # 17211-165-730. Check OEM # for precise application