- Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion, thus providing a longer piston life
- Coated skirts ease break-in, decreasing wear and aiding in lubrication
- Wear-resistant piston rings
- Wrist pins are nitride-coated, providing a hardened, wear-resistant bearing surface
- Piston rings are compatible with OEM pistons
- Piston kits include piston, rings, wrist pin and circlips
- Replacement rings are sold individually
Yamaha -- YZ 250 -- (2013, 2014, 2016, 2015, 2008, 2005, 2011, 2002, 2007, 2006, 2003, 1999, 2010, 2000, 2001, 2009, 2012, 2004, 2019, 2020, 2021, 2022, 2023, 2017, 2018); Yamaha -- YZ 250 X -- (2018, 2016, 2017, 2019, 2020, 2021, 2022, 2023)