POLARIS ATV PRIMARY CLUTCH ONE WAY BEARING - 1520231One Way Drive Clutch, Part 1520231 is a critical component in the clutch system. It is designed and tested by Polaris engineers to ensure proper fitment and durability through tens of thousands of hours of field tests, component level testing, and land launch testing. Fitment: ATV 2004, 1998 2001 Sportsman 500 2004 2005 Sportsman 700 EFI 2004 2005 ATP 500 4X4 2003 2005 Sportsman 600 2003 2004 Magnum 330 4X4 2002, 1999 2000 Magnum 500 2002 2005