{"product_id":"namura-na-10043-4k-87-48-mm-top-end-kit-for-honda-rancher-trx420","title":"NAMURA NA-10043-4K 87.48 mm Top End Kit for Honda Rancher TRX420","description":"\u003cp\u003eRestore upper-engine performance with the NAMURA NA-10043-4K Top End Kit, designed for select Honda Rancher 4x4 ATV models. This 87.48 mm, +1.00 mm oversize kit features an 11:1 compression ratio and includes the essential components needed for a reliable top-end rebuild: piston, piston rings, wrist pin, retaining clips, top-end bearing, and gasket kit. The kit is manufactured for accurate fitment and dependable service in compatible Honda engines.\u003c\/p\u003e\u003cp\u003eThe NAMURA piston uses a MOS2, or Teflon\/Molybdenum, coated skirt applied through a rolled-on process for a strong, durable bond. This coating helps improve heat transfer, reduce friction, and minimize the risk of cold seizures. The machined smooth head is designed to reflect combustion heat and help reduce carbon buildup, supporting piston protection and consistent engine operation. An anodized dome improves heat resistance and durability, while the hypereutectic casting process adds silicon for controlled expansion, increased wear resistance, and improved performance under higher cylinder temperatures.\u003c\/p\u003e\u003cp\u003eFitment includes 2014-2016 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA], 2014-2017 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA], and 2014-2016 Honda TRX420FE1 Rancher 4x4 ES [SRA]. Verify the model designation, year, bore requirement, and compression specifications before installation. The manufacturer part number and vendor part number are both NAMURA NA-10043-4K.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete Top End Kit: Includes piston, rings, wrist pin, retaining clips, top-end bearing, and gasket kit\u003c\/li\u003e\n\u003cli\u003e87.48 mm Bore: +1.00 mm oversize piston specification for compatible Honda Rancher applications\u003c\/li\u003e\n\u003cli\u003e11:1 Compression Ratio: Supports the specified engine rebuild configuration\u003c\/li\u003e\n\u003cli\u003eMOS2-Coated Skirt: Rolled-on Teflon\/Molybdenum coating helps reduce friction, improve heat transfer, and minimize cold-seizure risk\u003c\/li\u003e\n\u003cli\u003eMachined Smooth Head: Helps reflect combustion heat and reduce carbon buildup on the piston crown\u003c\/li\u003e\n\u003cli\u003eAnodized Dome: Provides increased heat resistance and durability compared with non-anodized piston domes\u003c\/li\u003e\n\u003cli\u003eHypereutectic Casting: Higher silicon content helps control expansion and improve wear resistance at elevated cylinder temperatures\u003c\/li\u003e\n\u003cli\u003eFitment: For select 2014-2017 Honda TRX420FA1, TRX420FA2, and TRX420FE1 Rancher 4x4 models\u003c\/li\u003e\n\u003cli\u003eBrand and Part Number: NAMURA manufacturer and vendor part number NA-10043-4K\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2009 Honda TRX420FA Rancher AT [IRS]\u003cbr\u003e\n2009 Honda TRX420FE Rancher ES [SRA]\u003cbr\u003e\n2009 Honda TRX420FM Rancher [SRA]\u003cbr\u003e\n2009 Honda TRX420FPA Rancher w\/PS [IRS]\u003cbr\u003e\n2009 Honda TRX420FPE Rancher ES w\/PS [SRA]\u003cbr\u003e\n2009 Honda TRX420FPM Rancher w\/PS [SRA]\u003cbr\u003e\n2009 Honda TRX420TE Rancher 2x4 ES [SRA]\u003cbr\u003e\n2009 Honda TRX420TM Rancher [SRA]\u003cbr\u003e\n2010 Honda TRX420FA Rancher AT [IRS]\u003cbr\u003e\n2010 Honda TRX420FE Rancher ES [SRA]\u003cbr\u003e\n2010 Honda TRX420FM Rancher [SRA]\u003cbr\u003e\n2010 Honda TRX420FPA Rancher w\/PS [IRS]\u003cbr\u003e\n2010 Honda TRX420FPE Rancher ES w\/PS [SRA]\u003cbr\u003e\n2010 Honda TRX420FPM Rancher w\/PS [SRA]\u003cbr\u003e\n2010 Honda TRX420TE Rancher 2x4 ES [SRA]\u003cbr\u003e\n2010 Honda TRX420TM Rancher [SRA]\u003cbr\u003e\n2011 Honda TRX420FA Rancher AT [IRS]\u003cbr\u003e\n2011 Honda TRX420FE Rancher ES [SRA]\u003cbr\u003e\n2011 Honda TRX420FM Rancher [SRA]\u003cbr\u003e\n2011 Honda TRX420FPA Rancher w\/PS [IRS]\u003cbr\u003e\n2011 Honda TRX420FPE Rancher ES w\/PS [SRA]\u003cbr\u003e\n2011 Honda TRX420FPM Rancher w\/PS [SRA]\u003cbr\u003e\n2011 Honda TRX420TE Rancher 2x4 ES [SRA]\u003cbr\u003e\n2011 Honda TRX420TM Rancher [SRA]\u003cbr\u003e\n2012 Honda TRX420FA Rancher AT [IRS]\u003cbr\u003e\n2012 Honda TRX420FE Rancher ES [SRA]\u003cbr\u003e\n2012 Honda TRX420FM Rancher [SRA]\u003cbr\u003e\n2012 Honda TRX420FPA Rancher w\/PS [IRS]\u003cbr\u003e\n2012 Honda TRX420FPE Rancher ES w\/PS [SRA]\u003cbr\u003e\n2012 Honda TRX420FPM Rancher w\/PS [SRA]\u003cbr\u003e\n2012 Honda TRX420TE Rancher 2x4 ES [SRA]\u003cbr\u003e\n2012 Honda TRX420TM Rancher [SRA]\u003cbr\u003e\n2013 Honda TRX420FA Rancher AT [IRS]\u003cbr\u003e\n2013 Honda TRX420FE Rancher ES [SRA]\u003cbr\u003e\n2013 Honda TRX420FM Rancher [SRA]\u003cbr\u003e\n2013 Honda TRX420FPA Rancher w\/PS [IRS]\u003cbr\u003e\n2013 Honda TRX420FPE Rancher ES w\/PS [SRA]\u003cbr\u003e\n2013 Honda TRX420FPM Rancher w\/PS [SRA]\u003cbr\u003e\n2013 Honda TRX420TE Rancher 2x4 ES [SRA]\u003cbr\u003e\n2013 Honda TRX420TM Rancher [SRA]\u003cbr\u003e\n2014 Honda TRX420FA Rancher AT [IRS]\u003cbr\u003e\n2014 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA]\u003cbr\u003e\n2014 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2014 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2014 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2014 Honda TRX420FM2 Rancher 4x4 EPS [SRA]\u003cbr\u003e\n2014 Honda TRX420FPA Rancher w\/PS [IRS]\u003cbr\u003e\n2014 Honda TRX420TE1 Rancher 2x4 ES [SRA]\u003cbr\u003e\n2014 Honda TRX420TM1 Rancher [SRA]\u003cbr\u003e\n2015 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA]\u003cbr\u003e\n2015 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2015 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2015 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2015 Honda TRX420FM2 Rancher 4x4 EPS [SRA]\u003cbr\u003e\n2015 Honda TRX420TE1 Rancher 2x4 ES [SRA]\u003cbr\u003e\n2015 Honda TRX420TM1 Rancher [SRA]\u003cbr\u003e\n2016 Honda TRX420FA1 Rancher 4x4 AT DCT [SRA]\u003cbr\u003e\n2016 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2016 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]\u003cbr\u003e\n2016 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]\u003cbr\u003e\n2016 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2016 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2016 Honda TRX420FM2 Rancher 4x4 EPS [SRA]\u003cbr\u003e\n2016 Honda TRX420TE1 Rancher 2x4 ES [SRA]\u003cbr\u003e\n2016 Honda TRX420TM1 Rancher [SRA]\u003cbr\u003e\n2017 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2017 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]\u003cbr\u003e\n2017 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]\u003cbr\u003e\n2017 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2017 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2017 Honda TRX420TM1 Rancher [SRA]\u003cbr\u003e\n2018 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2018 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]\u003cbr\u003e\n2018 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]\u003cbr\u003e\n2018 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2018 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2018 Honda TRX420TM1 Rancher [SRA]\u003cbr\u003e\n2023 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2023 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]\u003cbr\u003e\n2023 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]\u003cbr\u003e\n2023 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2023 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2023 Honda TRX420FM2 Rancher 4x4 EPS [SRA]\u003cbr\u003e\n2023 Honda TRX420TE1 Rancher 2x4 ES [SRA]\u003cbr\u003e\n2023 Honda TRX420TM1 Rancher [SRA]\u003cbr\u003e\n2024 Honda TRX420FA2 Rancher 4x4 AT DCT EPS [SRA]\u003cbr\u003e\n2024 Honda TRX420FA5 Rancher 4x4 AT DCT [IRS]\u003cbr\u003e\n2024 Honda TRX420FA6 Rancher 4x4 AT DCT EPS [IRS]\u003cbr\u003e\n2024 Honda TRX420FE1 Rancher 4x4 ES [SRA]\u003cbr\u003e\n2024 Honda TRX420FM1 Rancher 4x4 [SRA]\u003cbr\u003e\n2024 Honda TRX420FM2 Rancher 4x4 EPS [SRA]\u003cbr\u003e\n2024 Honda TRX420TE1 Rancher 2x4 ES [SRA]\u003cbr\u003e\n2024 Honda TRX420TM1 Rancher [SRA]","brand":"NAMURA","offers":[{"title":"Default Title","offer_id":67559262650603,"sku":"186-10434","price":155.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/dd77-572a583cd9540_5cdaba33-9b02-4a1d-a9fd-9a9a6fb4b8db.jpg?v=1790771317","url":"https:\/\/ctracingservices.com\/products\/namura-na-10043-4k-87-48-mm-top-end-kit-for-honda-rancher-trx420","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}