Wossner Piston Kit - 76.97 Mm - Yamaha 8559Db

• Enhanced piston pin oiling slots, radial boss machining, and annular grooves for improved wrist pin lubrication • Lightweight piston with a tight piston wall clearance for a quieter running engine • Skirt coated for reduced friction and improved break in performance • Ring land treatment for improved ring seal and oil control • Double bridged forging design where noted • Kit includes piston, rings, wrist pin and pin locks - Yamaha WR 250 F (2004, 2007, 2009, 2013, 2008, 2002, 2005, 2010, 2011, 2012, 2001, 2003, 2006); Yamaha YZ 250 F (2002, 2004, 2001, 2003)