The NAMURA NA-50093K Standard Bore Top End Kit is designed for select Polaris 1000 twin-cylinder ATV and utility vehicle applications. This complete top-end replacement kit includes a piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit for a reliable engine rebuild. The standard-bore piston is engineered for proper fitment in compatible cylinders and helps restore compression, performance, and dependable operation.
The piston features MOS2, or Teflon and molybdenum, coated skirts applied through a rolled-on process that creates a strong bond. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures. Machined smooth heads help reflect combustion heat and reduce carbon buildup, while anodized domes improve heat resistance and durability. The hypereutectic casting process adds silicon for controlled expansion, increased wear resistance, and improved durability in elevated cylinder temperatures.
Designed for direct replacement use, this NAMURA top-end kit fits 2015–2017 Polaris Sportsman XP 1000 models, 2015–2017 Polaris Sportsman Touring XP 1000 models, and 2014–2017 Polaris Scrambler XP 1000 EPS models. Always compare the original components and confirm engine configuration before installation. Manufacturer part number NA-50093K and vendor part number 186-5093 identify this kit for ordering and application verification.
Features:
- Complete top-end kit includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit
- Standard-bore piston designed for compatible Polaris 1000 twin-cylinder engines
- MOS2-coated skirts help reduce friction, improve heat transfer, and minimize cold-seizure risk
- Machined smooth piston heads help reflect combustion heat and reduce carbon buildup
- Anodized piston domes provide increased heat resistance and durability
- Hypereutectic casting process provides controlled expansion, wear resistance, and improved high-temperature performance
- Fits 2015–2017 Polaris Sportsman XP 1000 models
- Fits 2015–2017 Polaris Sportsman Touring XP 1000 models
- Fits 2014–2017 Polaris Scrambler XP 1000 EPS models
- Brand: NAMURA
- Manufacturer part number: NA-50093K
- Vendor part number: 186-5093
Fitment:
2014 Polaris Scrambler XP 1000 EPS
2015 Polaris Scrambler XP 1000 EPS
2015 Polaris Sportsman Touring XP 1000
2015 Polaris Sportsman XP 1000
2016 Polaris Scrambler XP 1000 EPS
2016 Polaris Sportsman Touring XP 1000
2016 Polaris Sportsman XP 1000
2017 Polaris Scrambler XP 1000 EPS
2017 Polaris Sportsman Touring XP 1000
2017 Polaris Sportsman XP 1000
2018 Polaris Scrambler XP 1000 EPS
2018 Polaris Sportsman Touring XP 1000
2018 Polaris Sportsman XP 1000
2019 Polaris Sportsman Touring XP 1000