The Namura NA-50026-2 piston kit is designed for select Polaris ATV and UTV applications requiring an 88.39 mm (+0.50 mm) replacement piston. This kit is intended for use with the listed Polaris Sportsman and Ranger models and provides a purpose-built replacement solution for compatible engine rebuilds. The manufacturer is Namura, and the vendor part number is NA-50026-2.
Fitment: Fits 2008–2014 Polaris Sportsman 400 HO 2x4, 2006–2007 Polaris Sportsman 450, and 2010 Polaris Ranger 400 4X4 Midsize. Verify the vehicle model, engine specifications, and required oversize before ordering to ensure proper application.
This Namura piston kit is not compatible with OEM piston rings, and the included or applicable rings will not work with an OEM piston. Use the piston and ring components as a matched set according to the manufacturer’s specifications. Proper cylinder preparation, clearance measurement, and professional installation are recommended during engine service. The piston kit is supplied for the designated oversize application and should be installed only after confirming cylinder condition and compatibility.
Features:
- Size: 88.39 mm piston diameter with a +0.50 mm oversize
- Model: NA-50026-2 piston kit
- Brand: Namura
- Manufacturer Part Number: NA-50026-2
- Vendor Part Number: NA-50026-2
- Fitment: 2008–2014 Polaris Sportsman 400 HO 2x4
- Fitment: 2006–2007 Polaris Sportsman 450
- Fitment: 2010 Polaris Ranger 400 4X4 Midsize
- Compatibility: Will not accept OEM rings, and the rings will not work on an OEM piston
Fitment:
2001 Polaris Sportsman 400 4X4
2002 Polaris Sportsman 400 4X4
2003 Polaris Ranger 425 2X4
2003 Polaris Sportsman 400 4X4
2004 Polaris Ranger 425 2X4
2004 Polaris Sportsman 400 4X4
2005 Polaris Sportsman 400 4X4
2006 Polaris Sportsman 450
2007 Polaris Sportsman 450
2008 Polaris Sportsman 400 HO 2x4
2009 Polaris Sportsman 400 HO 2x4
2010 Polaris Ranger 400 4X4 [Midsize]
2010 Polaris Sportsman 400 HO 2x4
2011 Polaris Ranger 400 4X4 [Midsize]
2011 Polaris Sportsman 400 HO 2x4
2012 Polaris Hawkeye 400 HO 2x4
2012 Polaris Ranger 400 4X4 [Midsize]
2012 Polaris Sportsman 400 HO 2x4
2013 Polaris Hawkeye 400 HO 2x4
2013 Polaris Ranger 400 4X4 [Midsize]
2013 Polaris Sportsman 400 HO 2x4
2014 Polaris Hawkeye 400 HO 2x4
2014 Polaris Ranger 400 4X4 [Midsize]
2014 Polaris Sportsman 400 HO 2x4