The NAMURA NA-50070 piston kit is designed for select Polaris 700 engines with Nikasil-plated cylinders. This standard-size piston features a 79.95 mm bore fit and an 11:1 compression ratio, making it a suitable replacement for restoring engine performance and reliability in compatible ATV and utility vehicle applications.
This piston kit fits the 2004–2007 Polaris Sportsman 700 EFI 4x4, 2007 Polaris Ranger 700 4x4, 2006–2009 Polaris Ranger 700 6x6, and 2008 Polaris Sportsman X2 700. Verify the vehicle model, engine configuration, cylinder condition, and required piston size before installation. The kit is intended for use with compatible Nikasil-plated cylinders and is not interchangeable with OEM piston rings.
The NAMURA NA-50070 is manufactured for direct replacement use in specified Polaris applications. OEM rings will not fit this piston, and the piston rings supplied or specified for this kit must be used. Professional installation is recommended, including inspection of cylinder plating, piston clearance, ring end gap, and related engine components to ensure proper fit and service life.
Features:
- Brand: NAMURA
- Manufacturer Part Number: NA-50070
- Vendor Part Number: 187-50070
- Piston Size: Standard 79.95 mm bore fit
- Compression Ratio: 11:1
- Cylinder Compatibility: Designed for Nikasil-plated cylinders
- Fitment: 2004–2007 Polaris Sportsman 700 EFI 4x4
- Fitment: 2007 Polaris Ranger 700 4x4
- Fitment: 2006–2009 Polaris Ranger 700 6x6
- Fitment: 2008 Polaris Sportsman X2 700
- Ring Compatibility: Will not accept OEM rings; OEM rings will not work with this 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