NAMURA NA-10042-3 87.23 mm Piston Kit for Honda TRX420 Rancher

Will not accept OEM rings and rings will not work on OEM piston

The NAMURA NA-10042-3 Piston Kit is a precision replacement component designed for select Honda TRX420 Rancher ATV applications. This oversized piston measures 87.23 mm, equivalent to approximately 3.434 inches, and is intended for engine rebuilds requiring a +0.75 mm piston size. The kit is engineered to support reliable fitment and consistent performance when installed with the correct compatible components.

This piston kit fits 2014–2017 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA], 2014–2016 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA], and 2014–2016 Honda TRX420FE1 Rancher 4x4 ES [SRA] models. Verify the model year, engine specifications, bore size, and required clearance before ordering or installation. The NAMURA manufacturer part number and vendor part number are both NA-10042-3.

Important compatibility note: This piston kit will not accept OEM piston rings, and its rings are not compatible with an OEM piston. Use the correct NAMURA-compatible ring set and follow the manufacturer’s installation, clearance, and break-in recommendations. Professional installation is recommended to help ensure proper engine operation and service life.

Features:

• Size: 87.23 mm piston, approximately 3.434 inches
• Oversize: +0.75 mm for applicable engine rebuilds
• Brand: NAMURA
• Model: Piston Kit 87.23/+0.75 Honda TRX420 Rancher
• Manufacturer part number: NA-10042-3
• Vendor part number: NA-10042-3
• Fitment: Select 2014–2017 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA] models
• Fitment: Select 2014–2016 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA] models
• Fitment: Select 2014–2016 Honda TRX420FE1 Rancher 4x4 ES [SRA] models
• Compatibility: Does not accept OEM rings and its rings will not work with an OEM piston

Fitment:
2007 Honda TRX420FE Rancher ES [SRA]
2007 Honda TRX420FM Rancher [SRA]
2007 Honda TRX420TE Rancher 2x4 ES [SRA]
2007 Honda TRX420TM Rancher [SRA]
2008 Honda TRX420FE Rancher ES [SRA]
2008 Honda TRX420FM Rancher [SRA]
2008 Honda TRX420TE Rancher 2x4 ES [SRA]
2008 Honda TRX420TM Rancher [SRA]
2009 Honda TRX420FA Rancher AT [IRS]
2009 Honda TRX420FE Rancher ES [SRA]
2009 Honda TRX420FM Rancher [SRA]
2009 Honda TRX420FPA Rancher w/PS [IRS]
2009 Honda TRX420FPE Rancher ES w/PS [SRA]
2009 Honda TRX420FPM Rancher w/PS [SRA]
2009 Honda TRX420TE Rancher 2x4 ES [SRA]
2009 Honda TRX420TM Rancher [SRA]
2010 Honda TRX420FA Rancher AT [IRS]
2010 Honda TRX420FE Rancher ES [SRA]
2010 Honda TRX420FM Rancher [SRA]
2010 Honda TRX420FPA Rancher w/PS [IRS]
2010 Honda TRX420FPE Rancher ES w/PS [SRA]
2010 Honda TRX420FPM Rancher w/PS [SRA]
2010 Honda TRX420TE Rancher 2x4 ES [SRA]
2010 Honda TRX420TM Rancher [SRA]
2011 Honda TRX420FA Rancher AT [IRS]
2011 Honda TRX420FE Rancher ES [SRA]
2011 Honda TRX420FM Rancher [SRA]
2011 Honda TRX420FPA Rancher w/PS [IRS]
2011 Honda TRX420FPE Rancher ES w/PS [SRA]
2011 Honda TRX420FPM Rancher w/PS [SRA]
2011 Honda TRX420TE Rancher 2x4 ES [SRA]
2011 Honda TRX420TM Rancher [SRA]
2012 Honda TRX420FA Rancher AT [IRS]
2012 Honda TRX420FE Rancher ES [SRA]
2012 Honda TRX420FM Rancher [SRA]
2012 Honda TRX420FPA Rancher w/PS [IRS]
2012 Honda TRX420FPE Rancher ES w/PS [SRA]
2012 Honda TRX420FPM Rancher w/PS [SRA]
2012 Honda TRX420TE Rancher 2x4 ES [SRA]
2012 Honda TRX420TM Rancher [SRA]
2013 Honda TRX420FA Rancher AT [IRS]
2013 Honda TRX420FE Rancher ES [SRA]
2013 Honda TRX420FM Rancher [SRA]
2013 Honda TRX420FPA Rancher w/PS [IRS]
2013 Honda TRX420FPE Rancher ES w/PS [SRA]
2013 Honda TRX420FPM Rancher w/PS [SRA]
2013 Honda TRX420TE Rancher 2x4 ES [SRA]
2013 Honda TRX420TM Rancher [SRA]
2014 Honda TRX420FA Rancher AT [IRS]
2014 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA]
2014 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]
2014 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2014 Honda TRX420FM1 Rancher 4x4 [SRA]
2014 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2014 Honda TRX420FPA Rancher w/PS [IRS]
2014 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2014 Honda TRX420TM1 Rancher [SRA]
2015 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA]
2015 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]
2015 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]
2015 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]
2015 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2015 Honda TRX420FM1 Rancher 4x4 [SRA]
2015 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2015 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2015 Honda TRX420TM1 Rancher [SRA]
2016 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA]
2016 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]
2016 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]
2016 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]
2016 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2016 Honda TRX420FM1 Rancher 4x4 [SRA]
2016 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2016 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2016 Honda TRX420TM1 Rancher [SRA]
2017 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]
2017 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]
2017 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]
2017 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2017 Honda TRX420FM1 Rancher 4x4 [SRA]
2017 Honda TRX420TM1 Rancher [SRA]
2018 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]
2018 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]
2018 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]
2018 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2018 Honda TRX420FM1 Rancher 4x4 [SRA]
2018 Honda TRX420TM1 Rancher [SRA]
2019 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]
2019 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]
2019 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]
2019 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2019 Honda TRX420FM1 Rancher 4x4 [SRA]
2019 Honda TRX420TM1 Rancher [SRA]
2020 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]
2020 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]
2020 Honda TRX420FE Rancher ES [IRS]
2020 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2020 Honda TRX420FM1 Rancher 4x4 [SRA]
2020 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2020 Honda TRX420TM1 Rancher [SRA]
2021 Honda TRX420FE Rancher ES [IRS]
2021 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2021 Honda TRX420FM1 Rancher 4x4 [SRA]
2021 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2021 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2021 Honda TRX420TM1 Rancher [SRA]
2022 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2022 Honda TRX420FM1 Rancher 4x4 [SRA]
2022 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2022 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2022 Honda TRX420TM1 Rancher [SRA]
2023 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2023 Honda TRX420FM1 Rancher 4x4 [SRA]
2023 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2023 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2023 Honda TRX420TM1 Rancher [SRA]
2024 Honda TRX420FE1 Rancher 4x4 ES [SRA]
2024 Honda TRX420FM1 Rancher 4x4 [SRA]
2024 Honda TRX420FM2 Rancher 4x4 EPS [SRA]
2024 Honda TRX420TE1 Rancher 2x4 ES [SRA]
2024 Honda TRX420TM1 Rancher [SRA]