The Namura NA-50011-2 Piston Kit is designed for select Polaris Sportsman 550 ATV applications requiring a 97.07 mm piston with a +0.50 mm oversize specification. This replacement piston kit supports dependable engine service and is intended for use with properly machined cylinders matched to the specified piston size.
Fitment: Fits 2010–2014 Polaris Sportsman 550, 2010 Polaris Sportsman 550 EPS, 2014 Polaris Sportsman X2 550 EPS, and 2010–2014 Polaris Sportsman Touring 550 EPS applications as specified by the manufacturer. Confirm the model year, engine configuration, cylinder bore, and required oversize before ordering.
This Namura piston kit uses manufacturer part number NA-50011-2 and is supplied for applications that require the corresponding Namura piston and ring configuration. It will not accept OEM rings, and the included rings are not compatible with an OEM piston. Professional installation is recommended, including verification of cylinder condition, piston-to-cylinder clearance, ring end gap, and all applicable engine specifications.
Features:
- Size: 97.07 mm piston with +0.50 mm oversize specification
- Model: Replacement piston kit for Polaris Sportsman 550 applications
- Brand: Namura
- Manufacturer Part Number: NA-50011-2
- Vendor Part Number: NA-50011-2
- Fitment: 2010–2014 Polaris Sportsman 550, selected Sportsman 550 EPS, Sportsman X2 550 EPS, and Sportsman Touring 550 EPS models
- Compatibility: Will not accept OEM rings, and the supplied rings will not work on an OEM piston
- Installation: Requires cylinder verification and professional assembly according to applicable engine specifications
Fitment:
2009 Polaris Sportsman XP 550
2009 Polaris Sportsman XP 550 EPS
2010 Polaris Sportsman 550
2010 Polaris Sportsman 550 EPS
2010 Polaris Sportsman Touring 550 EPS
2010 Polaris Sportsman X2 550
2010 Polaris Sportsman XP 550
2011 Polaris Sportsman 550
2011 Polaris Sportsman 550 EPS
2011 Polaris Sportsman Touring 550 EPS
2011 Polaris Sportsman X2 550
2012 Polaris Sportsman 550
2012 Polaris Sportsman 550 EPS
2012 Polaris Sportsman Touring 550 EPS
2012 Polaris Sportsman X2 550
2013 Polaris Sportsman 550
2013 Polaris Sportsman 550 EPS
2013 Polaris Sportsman Touring 550 EPS
2013 Polaris Sportsman X2 550
2013 Polaris Sportsman XP 550
2014 Polaris Sportsman 550 EPS
2014 Polaris Sportsman Touring 550 EPS
2014 Polaris Sportsman X2 550 EPS
2014 Polaris Sportsman XP 550