Wiseco Top End Bearing B1031 2005-2009 Ski-Doo GSX 500SS Sport, 2005-2006 Ski-Doo MX Z 500 Adrenaline, 2007 Ski-Doo MX Z 600 Blizzard, 2007 Ski-Doo MX Z 800 Blizzard, 2001-2004 Polaris 700 Classic, 2003-2004 Polaris 700 Classic Touring, 2003-2004 Polaris 700 PRO X, 1997-2004 Polaris 700 RMK, 1999-2003 Polaris 700 SKS, 2004 Polaris 700 SwitchBack, 1998-1999 Polaris 700 XC, 2003 Polaris 700 XC, 1999-2005 Polaris 700 XC SP, 2005-2008 Ski-Doo Expedition TUV 600, 2000-2001 Ski-Doo Formula Deluxe 600, Top end needle cage bearings manufactured to the highest quality OEM specifications