The Namura NA-50012-4 piston kit is designed for select Polaris 850 power sports applications requiring an 87.93 mm oversize piston. This replacement piston kit is engineered for dependable performance and precise fitment in compatible Polaris engines. The kit is intended for professional installation during an engine rebuild or top-end service.
Fitment: Fits 2015–2017 Polaris Sportsman 850, 2015–2017 Polaris Sportsman 850 SP, 2015–2017 Polaris Sportsman Touring 850 SP, and 2015 Polaris Scrambler 850. Verify the original piston, cylinder condition, and engine specifications before installation to ensure proper compatibility.
Important compatibility note: The Namura NA-50012-4 piston will not accept OEM rings, and the included or correctly matched replacement rings must not be used with an OEM piston. Always use the appropriate ring set for this Namura piston and follow the manufacturer's installation, clearance, and break-in procedures. Namura is the brand, and NA-50012-4 is the manufacturer and vendor part number for this replacement piston kit.
Features:
- Size: 87.93 mm oversize piston
- Model: NA-50012-4
- Brand: Namura
- Manufacturer part number: NA-50012-4
- Vendor part number: NA-50012-4
- Application: Replacement piston kit for select Polaris 850 engines
- Fitment: 2015–2017 Polaris Sportsman 850, Sportsman 850 SP, Sportsman Touring 850 SP, and 2015 Polaris Scrambler 850
- Compatibility: Will not accept OEM rings and must not be used with an OEM piston ring set
Fitment:
2009 Polaris Sportsman XP 850
2009 Polaris Sportsman XP 850 EPS
2010 Polaris Sportsman Touring 850 EPS
2010 Polaris Sportsman XP 850
2010 Polaris Sportsman XP 850 EPS
2011 Polaris Sportsman Touring 850 EPS
2011 Polaris Sportsman X2 850
2011 Polaris Sportsman XP 850
2011 Polaris Sportsman XP 850 EPS
2012 Polaris Sportsman Touring 850 EPS
2012 Polaris Sportsman XP 850
2012 Polaris Sportsman XP 850 EPS
2013 Polaris Scrambler XP 850
2013 Polaris Scrambler XP 850 EPS
2013 Polaris Sportsman Touring 850 EPS
2013 Polaris Sportsman XP 850
2013 Polaris Sportsman XP 850 EPS
2014 Polaris Scrambler XP 850
2014 Polaris Scrambler XP 850 EPS
2014 Polaris Sportsman 850 HO Wv
2014 Polaris Sportsman Touring 850 EPS
2014 Polaris Sportsman XP 850 EPS
2015 Polaris Scrambler 850
2015 Polaris Sportsman 850
2015 Polaris Sportsman 850 SP
2015 Polaris Sportsman Touring 850 SP
2016 Polaris Scrambler 850
2016 Polaris Sportsman 850
2016 Polaris Sportsman 850 SP
2016 Polaris Sportsman Touring 850 SP
2017 Polaris Scrambler 850
2017 Polaris Sportsman 850
2017 Polaris Sportsman 850 SP
2017 Polaris Sportsman Touring 850 SP
2018 Polaris Scrambler 850
2018 Polaris Sportsman 850
2018 Polaris Sportsman 850 SP
2018 Polaris Sportsman Touring 850 SP
2019 Polaris Scrambler 850
2019 Polaris Sportsman 850
2019 Polaris Sportsman 850 SP
2019 Polaris Sportsman Touring 850 SP
2020 Polaris Sportsman 850
2020 Polaris Sportsman Touring 850 EPS