This starter clutch one-way bearing gear assembly is compatible with select ATV models including 500, 400, Big Boss, 250, and 325 series.It replaces OEM part numbers 3083647, 3089255, and 3085394.Compatible vehicles include: 400L 2X4/4X4 (1994–1995), ATP 330/500 HO (2004–2005), ATV Pro 500 (2002), Big Boss 300 (1994–1995), Scrambler 250/400/500 (various years), Trail Boss 250/325/330, XPlorer 250/300/400/500, and multiple other specified models from 1985 through 2014 as listed in fitment details.This is a direct replacement part designed to restore starter clutch function.