This is a water pump seal.
This will fit the following Yamaha bikes:
DT50 Enduro 1990Majesty 400 YP400 2005-2015Morphous CP250 2006, 2007, 2008SMAX 2015-2020Vino Classic 50 XC50 2006-2018WR200 1992WR250 1991-1997WR250R 2008-2020WR250X 2008, 2009, 2010, 2011XF50 C3 2007, 2008, 2009, 2010, 2011XMAX 2018, 2020, 2021, 2022YZ125 1990-1997YZ250 1990-1997YZ80 1990-2000Zuma 50F 2014, 2015, 2016, 2017, 2018Zuma 50FX 2014, 2015, 2016, 2017, 2018Zuma 50 YW50 2012, 2013YFZ350 Banshee 1987-2006