Athena Piston Kit - 52.95 Mm - Yamaha S5F05300001A

• Two-stroke pistons are made from 4032 silicium • Both include 3% copper in materials for better heat resistance • All pistons are forged using a precision heat-treatment process that allows for production tolerances of just 0.01 mm • Forged piston tooling allows for the lightest available product • Kit includes antiwear coated piston, rings, pin and circlips - Yamaha YZ 85 (2003, 2011, 2012, 2014, 2009, 2019, 2022, 2002, 2008, 2010, 2013, 2016, 2017, 2023, 2005, 2007, 2024, 2025, 2020, 2015, 2021, 2004, 2006, 2018)