YFXXXX-050XXXX2Z1X YFXXXX-100XXXX2Z1X YFZ450 ATV YEAR 2005 449CC STARTER DRIVE YFZ450 ATV YEAR 2006 449CC STARTER DRIVE YFZ450 ATV YEAR 2007 449CC STARTER DRIVE YFZ450 ATV YEAR 2012 449CC STARTER DRIVE YFZ450 ATV YEAR 2013 449CC STARTER DRIVE YFZ450R ATV YEAR 2012 449CC STATOR YFZ450R ATV YEAR 2015 449CC STATOR YFZ450R ATV YEAR 2017 449CC STATOR