The Namura NA-50070-B piston kit is designed for select Polaris 700 applications with a Nikasil-plated cylinder. This 79.96 mm piston features an 11:1 compression ratio and is intended to support dependable engine rebuilding and replacement performance. The kit is manufactured by Namura and is identified by manufacturer part number NA-50070-B and vendor part number 187-50070B.
This piston kit fits the 2004–2007 Polaris Sportsman 700 EFI 4x4, 2006–2009 Polaris Ranger 700 6x6, 2007 Polaris Ranger 700 4x4, and 2008 Polaris Sportsman X2 700. Verify the exact model, year, cylinder finish, and piston specification before installation to ensure proper application.
Important fitment note: The Namura NA-50070-B piston kit will not accept OEM piston rings, and the supplied rings are not compatible with an OEM piston. Use the correct Namura components as a matched set and follow the engine manufacturer’s service procedures for inspection, clearance verification, ring installation, and break-in.
Features:
- Brand: Namura
- Manufacturer Part Number: NA-50070-B
- Vendor Part Number: 187-50070B
- Piston Size: 79.96 mm
- Compression Ratio: 11:1
- Cylinder Type: Nikasil-plated cylinder
- Application: Select Polaris 700 ATV and utility vehicle models
- Fitment: 2004–2007 Polaris Sportsman 700 EFI 4x4
- Fitment: 2006–2009 Polaris Ranger 700 6x6
- Fitment: 2007 Polaris Ranger 700 4x4
- Fitment: 2008 Polaris Sportsman X2 700
- Compatibility: Will not accept OEM rings, and supplied rings will not work on an OEM piston
Fitment:
2002 Polaris Sportsman 700 4x4
2003 Polaris Sportsman 700 4x4
2004 Polaris Sportsman 700 4x4
2004 Polaris Sportsman 700 Efi 4x4
2005 Polaris Sportsman 700 4x4
2005 Polaris Sportsman 700 Efi 4x4
2006 Polaris Ranger 700 6X6
2006 Polaris Sportsman 700 4x4
2006 Polaris Sportsman 700 Efi 4x4
2007 Polaris Ranger 700 4X4
2007 Polaris Ranger 700 6X6
2007 Polaris Sportsman 700 Efi 4x4
2008 Polaris Ranger 700 4X4
2008 Polaris Ranger 700 6X6
2008 Polaris Sportsman X2 700
2009 Polaris Ranger 700 4X4
2009 Polaris Ranger 700 6X6