NICHE Drive Clutch Kit Part Number: MK1001087 Includes: Drive Clutch Assembly (With Spring & Weights) This Part is known to be Compatible with the following vehicles: Polaris ATP 500 HO: 2004-2005 Polaris Big Boss 500 6X6: 1998 Polaris Magnum 325 Freedom: 2002 Polaris Magnum 325: 2002 Polaris Magnum 330: 2004 Polaris Magnum 425: 1998 Polaris Magnum 500: 1999-2003 Polaris Scrambler 500 2X4: 2002 Polaris Sportsman 500 HO Limited: 2001 Polaris Sportsman 500 HO: 2001-2005 Polaris Sportsman 500 Limited: 2001 Polaris Sportsman 500: 1998-2005 Polaris Worker 500: 1999-2001 This Clutch replaces the original Polaris part no.1321706. This Clutch has a Heat Treated Center Shaft for unequalled strength ensuring it stays in your vehicle longer. We also use a Magnesium-Aluminum alloy mix for our Clutches which is both light and strong. Ultimately it creates a Drive Clutch with a much higher break force than other aftermarket alternatives.