The NAMURA NA-10014K Standard Top End Kit is designed for select Honda 500 powersports applications, including the Pioneer 500 and Foreman 500 models. This complete kit includes a piston, piston rings, wrist pin, retaining clips, top end bearing, and gasket kit for a convenient engine rebuild or top-end service. The piston features a 11:1 compression ratio and a standard bore configuration for compatible factory cylinders.
NAMURA manufactures this kit using a hypereutectic casting process that increases silicon content to help reduce expansion and improve wear resistance. The piston is engineered to withstand higher cylinder temperatures while maintaining dependable performance. MOS2, or Teflon and molybdenum, coated skirts use a rolled-on application process designed to create a stronger bond than spray-on coatings. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures.
The piston also features a machined smooth head to reflect combustion heat and help reduce carbon buildup. An anodized dome increases heat resistance and durability, providing additional protection in demanding operating conditions. The kit fits select 2014–2017 Honda TRX500FE1 Foreman 4X4 ES [SRA], TRX500FE2 Foreman 4X4 ES EPS [SRA], and TRX500FM1 Foreman 4X4 applications, along with 2015–2016 Honda SXS500M2 Pioneer 500 models. Verify the exact year, model, engine configuration, and standard-bore requirement before installation. The manufacturer part number is NA-10014K, and the vendor part number is 186-1014.
Features:
- Complete Top End Kit: Includes piston, piston rings, wrist pin, retaining clips, top end bearing, and gasket kit.
- Standard Bore Piston: Features a standard 91.97 mm bore and 11:1 compression ratio for compatible Honda 500 cylinders.
- MOS2-Coated Skirts: Rolled-on Teflon and molybdenum coating helps improve heat transfer, reduce friction, and minimize cold seizure risk.
- Machined Smooth Head: Helps reflect combustion heat and reduce carbon buildup for improved piston protection.
- Anodized Dome: Increases heat resistance and durability for demanding engine operating conditions.
- Hypereutectic Casting: Provides higher silicon content for reduced expansion, increased wear resistance, and improved high-temperature performance.
- Fitment: Fits select 2014–2017 Honda Foreman 500 and 2015–2016 Honda Pioneer 500 models.
- Manufacturer Part Number: NAMURA NA-10014K.
- Vendor Part Number: 186-1014.
Fitment:
2012 Honda TRX500FPE Foreman 4X4 ES w/PS [SRA]
2012 Honda TRX500FPM Rubicon 4X4 w/PS [SRA]
2013 Honda TRX500FPE Foreman 4X4 ES w/PS [SRA]
2013 Honda TRX500FPM Rubicon 4X4 w/PS [SRA]
2014 Honda TRX500FE1 Foreman 4X4 ES [SRA]
2014 Honda TRX500FE2 Foreman 4X4 ES EPS [SRA]
2014 Honda TRX500FM1 Foreman 4X4 [SRA]
2014 Honda TRX500FM2 Foreman 4X4 w/PS [SRA]
2015 Honda SXS500M2 Pioneer 500
2015 Honda TRX500FA5 Rubicon 4X4 Auto DCT [IRS]
2015 Honda TRX500FA6 Rubicon 4X4 Auto DCT EPS [IRS]
2015 Honda TRX500FE1 Foreman 4X4 ES [SRA]
2015 Honda TRX500FE2 Foreman 4X4 ES EPS [SRA]
2015 Honda TRX500FM1 Foreman 4X4 [SRA]
2015 Honda TRX500FM2 Foreman 4X4 w/PS [SRA]
2016 Honda SXS500M2 Pioneer 500
2016 Honda TRX500FA5 Rubicon 4X4 Auto DCT [IRS]
2016 Honda TRX500FA6 Rubicon 4X4 Auto DCT EPS [IRS]
2016 Honda TRX500FA7 Rubicon 4X4 Auto DCT EPS Deluxe [IRS]
2016 Honda TRX500FE1 Foreman 4X4 ES [SRA]
2016 Honda TRX500FE2 Foreman 4X4 ES EPS [SRA]
2016 Honda TRX500FM1 Foreman 4X4 [SRA]
2016 Honda TRX500FM2 Foreman 4X4 w/PS [SRA]
2017 Honda SXS500M2 Pioneer 500
2017 Honda TRX500FA5 Rubicon 4X4 Auto DCT [IRS]
2017 Honda TRX500FA6 Rubicon 4X4 Auto DCT EPS [IRS]
2017 Honda TRX500FA7 Rubicon 4X4 Auto DCT EPS Deluxe [IRS]
2017 Honda TRX500FE2 Foreman 4X4 ES EPS [SRA]
2017 Honda TRX500FM1 Foreman 4X4 [SRA]
2018 Honda SXS500M2 Pioneer 500
2018 Honda TRX500FA5 Rubicon 4X4 Auto DCT [IRS]
2018 Honda TRX500FA6 Rubicon 4X4 Auto DCT EPS [IRS]
2018 Honda TRX500FA7 Rubicon 4X4 Auto DCT EPS Deluxe [IRS]
2018 Honda TRX500FE2 Foreman 4X4 ES EPS [SRA]
2018 Honda TRX500FM1 Foreman 4X4 [SRA]
2019 Honda SXS500M2 Pioneer 500
2020 Honda SXS500M2 Pioneer 500
2021 Honda SXS500M2 Pioneer 500
2022 Honda SXS500M2 Pioneer 500
2023 Honda SXS500M2 Pioneer 500