The Namura NA-50004 Standard Bore Piston Kit is designed for select Polaris 500 engines and provides a direct replacement solution for worn or damaged piston components. This kit is intended for standard-bore applications and is engineered to support dependable performance, proper fit, and reliable service in compatible Polaris ATV and utility vehicle models.
Fitment: Fits 1998 Polaris Big Boss 500 6X6, 1999 Polaris Big Boss 500 6X6, 1999-2000 Polaris Sportsman 500 RSE 4x4, 2011-2013 Polaris Sportsman Touring 500 HO, and 2011-2013 Polaris Ranger Crew 500 4x4. Verify the engine configuration and application before ordering to ensure compatibility.
Important Compatibility Notice: The Namura NA-50004 piston kit will not accept OEM piston rings, and the included or specified rings are not compatible with an OEM piston. Use the piston and ring components as a matched set. This product is manufactured by Namura and is identified by manufacturer part number NA-50004 and vendor part number NA-50004.
Features:
- Standard Bore: Designed for compatible Polaris 500 engine applications
- Application: Fits select Polaris Sportsman, Big Boss, Ranger Crew, and Sportsman Touring models
- Brand: Namura
- Manufacturer Part Number: NA-50004
- Vendor Part Number: NA-50004
- Compatibility Notice: Will not accept OEM rings, and the rings will not work on an OEM piston
- Matched Components: Use the piston and ring set together for proper compatibility
Fitment:
1996 Polaris Sportsman 500 4X4
1997 Polaris Scrambler 500 4X4
1997 Polaris Sportsman 500 4X4
1997 Polaris Xplorer 500 4X4
1998 Polaris Big Boss 500 6X6
1998 Polaris Scrambler 500 4X4
1998 Polaris Sportsman 500 4X4
1999 Polaris Big Boss 500 6X6
1999 Polaris Magnum 500 4X4
1999 Polaris Ranger 500 6X6
1999 Polaris Scrambler 500 4X4
1999 Polaris Sportsman 500 4X4
1999 Polaris Sportsman 500 Rse 4x4
2000 Polaris Magnum 500 4X4
2000 Polaris Ranger 500 6X6
2000 Polaris Scrambler 500 4X4
2000 Polaris Sportsman 500 4X4
2000 Polaris Sportsman 500 Rse 4x4
2000 Polaris Sportsman 6X6 500
2001 Polaris Magnum 500 4X4
2001 Polaris Ranger 500 4X4
2001 Polaris Ranger 500 6X6
2001 Polaris Scrambler 500 2X4
2001 Polaris Scrambler 500 4X4
2001 Polaris Sportsman 500 HO 2x4
2001 Polaris Sportsman 500 HO RSE
2001 Polaris Sportsman 6X6 500
2002 Polaris Magnum 500 2X4
2002 Polaris Magnum 500 4X4
2002 Polaris Ranger 500 4X4
2002 Polaris Ranger 500 6X6
2002 Polaris Scrambler 500 2X4
2002 Polaris Scrambler 500 4X4
2002 Polaris Sportsman 500 HO 2x4
2002 Polaris Sportsman 500 HO RSE
2002 Polaris Sportsman 6X6 500
2003 Polaris Ranger 500 4X4
2003 Polaris Ranger 500 6X6
2003 Polaris Scrambler 500 4X4
2003 Polaris Sportsman 500 HO 2x4
2003 Polaris Sportsman 6X6 500
2004 Polaris Atp 500
2004 Polaris Ranger 500 4X4
2004 Polaris Ranger 500 6X6
2004 Polaris Scrambler 500 4X4
2004 Polaris Sportsman 500 HO 2x4
2004 Polaris Sportsman 6X6 500
2005 Polaris Atp 500
2005 Polaris Ranger 500 2X4
2005 Polaris Ranger 500 4X4
2005 Polaris Ranger 500 6X6
2005 Polaris Scrambler 500 4X4
2005 Polaris Sportsman 500 HO 2x4
2005 Polaris Sportsman 6X6 500
2006 Polaris Ranger 500 2X4
2006 Polaris Ranger 500 4X4
2006 Polaris Ranger 500 4X4 EFI
2006 Polaris Scrambler 500 4X4
2006 Polaris Sportsman 500 Efi
2006 Polaris Sportsman 500 HO 2x4
2006 Polaris Sportsman 6X6 500
2006 Polaris Sportsman X2 500
2007 Polaris Ranger 500 2X4
2007 Polaris Ranger 500 4X4
2007 Polaris Ranger 500 4X4 EFI
2007 Polaris Scrambler 500 4X4
2007 Polaris Sportsman 500 Deluxe
2007 Polaris Sportsman 500 Efi
2007 Polaris Sportsman 6X6 500
2007 Polaris Sportsman X2 500
2007 Polaris Sportsman X2 500 Deluxe
2008 Polaris Ranger 500 2X4
2008 Polaris Ranger 500 4X4 EFI
2008 Polaris Scrambler 500 4X4
2008 Polaris Sportsman 500 Efi
2008 Polaris Sportsman 500 HO 2x4
2008 Polaris Sportsman 6X6 500
2008 Polaris Sportsman Touring 500
2008 Polaris Sportsman X2 500
2009 Polaris Ranger 500 2X4
2009 Polaris Ranger 500 4X4 EFI
2009 Polaris Scrambler 500 4X4
2009 Polaris Sportsman 500 Efi
2009 Polaris Sportsman 500 HO 2x4
2009 Polaris Sportsman Touring 500
2009 Polaris Sportsman X2 500
2010 Polaris Ranger 500 4X4 EFI
2010 Polaris Scrambler 500 4X4
2010 Polaris Sportsman 500 HO 2x4
2010 Polaris Sportsman Touring 500 HO
2011 Polaris Ranger 500 4X4 EFI
2011 Polaris Ranger Crew 500 4x4
2011 Polaris Scrambler 500 4X4
2011 Polaris Sportsman 500 HO 2x4
2011 Polaris Sportsman Touring 500 HO
2012 Polaris Ranger 500 4X4 EFI
2012 Polaris Ranger Crew 500 4x4
2012 Polaris Scrambler 500 4X4
2012 Polaris Sportsman 500 HO 2x4
2012 Polaris Sportsman Touring 500 HO
2013 Polaris Ranger 500 4x4 EFI [Midsize]
2013 Polaris Ranger Crew 500 4x4
2013 Polaris Sportsman 500 HO 2x4
2013 Polaris Sportsman Touring 500 HO