Piston Rings Set 80mm For ATV 500 700 Forest 800 850 700 Crew RZR 4 800 RZR 170 900 2202127.This piston ring set is designed to fit specific ATV and UTV models to restore engine compression and performance.The set features a bore size of 80mm, a pin size of 18mm, an overall height of 46.8mm, and a compression height of 17mm.It is intended for 2-cylinder engines.Compatible models include 700 (2002-2006), 700 EFI (2005-2007), 700 EFI X2 (2008), MV7 (2005), 500 (2013), 800 6x6 Big Boss (2012-2014), 800 EFI (2005-2014), 800 EFI 6x6 Big Boss (2010-2011), 800 EFI X2 (2007-2009), 850 SP (2015), Forest 800 (2012-2014), Forest 800 6x6 (2012-2014), 4x4 700 EFI (2007), 6x6 700 EFI (2006-2009), 700 Crew (2008-2009), HD 700 (2009), XP 700 (2005-2006), 6x6 800 (2010-2017), 800 Crew (2010-2014), 800 EFI (2013-2014), 800 EFI Mid-Size (2014), 800 HD EPS (2012), RZR 4 800 (2012-2013), RZR 4 800 EPS Robby Gordon (2011), RZR 4 800 EPS Robby Gordon LE (2012), RZR 4 800 Gordon Edition (2010-2011), RZR 800 (2010-2014), RZR 800 S (2010-2014), RZR 170 (2014), RZR 4 800 EPS LE (2014), and RZR 900 (2014).Please verify your vehicle model and year before purchase to ensure proper fitment.