Wsm Piston Kit - 83.25 Mm - Yamaha 50-540-04K

• Quality and construction that meets or exceeds OEM
• Feature improved E-clip design
• Contain piston, rings, pin and clips
• Additional rings available separately
• Order one per cylinder
• Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce heat and friction for added power and longevity
• MOS2 coating actually draws heat through piston walls and out the bottom
• Specially hardened tops add strength to ring grooves

Yamaha -- Big Bear 350 4x4 -- (1992, 1998, 1999, 1993, 1995, 1997, 1994, 1996, 1988, 1990, 1989, 1991, 1987); Yamaha -- YFM 350 Warrior -- (1993, 2000, 1990, 1992, 1999, 2001, 1994, 1995, 1991, 1998, 1988, 2003, 1996, 1997, 1987, 1989, 2002, 2004); Yamaha -- Big Bear 350 SE 4x4 -- (1997); Yamaha -- Big Bear 350 4x2 -- (1997, 1996, 1999, 1998); Yamaha -- Big Bear 350 Hunter Edition 4x4 -- (1999); Yamaha -- YFM 350 FX Wolverine 4x4 -- (2000, 2004, 1997, 1998, 1995, 2002, 2001, 2005, 1996, 1999, 2003); Yamaha -- Grizzly 350 IRS 4x4 -- (2007, 2010, 2008, 2009, 2011); Yamaha -- Raptor 350 4x2 -- (2005, 2006, 2009, 2004, 2007, 2011, 2008, 2012, 2013, 2010); Yamaha -- YFM 350 -- (1992, 1994, 1995, 1987, 1988, 1990, 1989, 1991, 1993); Yamaha -- YFM 350 X Wolverine 4x2 -- (2007, 2008, 2006, 2009); Yamaha -- YFM 350 Bruin -- (2004, 2006, 2005); Yamaha -- Raptor 350 SE 4x2 -- (2007, 2005, 2006); Yamaha -- Grizzly 350 4x4 -- (2011, 2007, 2010, 2014, 2008, 2012, 2013, 2009)