{"product_id":"piston-ring-kit-honda-trx-420-rancher-os-0-50-2007-2013","title":"Piston Ring Kit OS 0.50 for Honda TRX 420 Rancher 2007 to 2013 Rebuild Replacement","description":"\u003cdiv\u003e\n\u003cp\u003eThis oversize piston ring kit OS 0.50 is the precise rebuild solution for the Honda TRX 420 Rancher’s 420cc single-cylinder engine, covering model years 2007 through 2013. It restores compression, reduces oil blow-by, and revives the power and reliability you felt when the machine was new. Designed to deliver factory-fit compatibility at a fraction of OEM cost, it provides a straightforward top-end refresh for rugged trail riding and hard-working farm tasks.\u003c\/p\u003e\n\u003cp\u003eThe OS 0.50 rings are chosen to address bore wear and sealing performance, making this kit a dependable, ready-to-go solution for trails, fields, and work sites where a reliable engine matters most. When wear accelerates, you’ll notice a gradual drop in compression, higher oil consumption, and slower throttle response; this kit targets those symptoms by restoring a tight piston-bore seal and reestablishing proper ring-gap dynamics. It’s engineered for consistent performance in demanding conditions without the premium OEM price tag.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Vehicle Fitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eModels \/ Series\u003c\/th\u003e\n\u003cth\u003eYears \/ Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420FE\u003c\/td\u003e\n\u003ctd\u003e2007–2013; 420cc single-cylinder engine; Rancher family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420FA\u003c\/td\u003e\n\u003ctd\u003e2009–2013; 420cc single-cylinder engine; Rancher family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420FM\u003c\/td\u003e\n\u003ctd\u003e2007–2013; 420cc single-cylinder engine; Rancher family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420TE\u003c\/td\u003e\n\u003ctd\u003e2007–2013; 420cc single-cylinder engine; Rancher family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420TM\u003c\/td\u003e\n\u003ctd\u003e2007–2013; 420cc single-cylinder engine; Rancher family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: The fitment above reflects model variants within the Honda TRX 420 Rancher family and the 2007–2013 period documented for this OS 0.50 kit.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Reference Part Numbers\u003c\/td\u003e\n\u003ctd\u003e13012-HP5-600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Kit – Oversize OS 0.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHonda TRX 420 Rancher (2007–2013)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePremium alloy ring material designed for wear resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003eOversize +0.50 mm; Actual bore ≈ 87.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRings Included\u003c\/td\u003e\n\u003ctd\u003eTop compression ring; Second compression ring; Oil control ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRings Configuration\u003c\/td\u003e\n\u003ctd\u003e3-ring set for a single-cylinder 420cc engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNotes: OS 0.50 indicates a bore increase of 0.50 mm over the standard size. The stated bore figure represents common spec for this oversize class on the TRX 420 Rancher family.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOEM \u0026amp; Aftermarket Cross-Reference Information\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e13012-HP5-600\u003c\/td\u003e\n\u003ctd\u003eHonda OEM Interchange\u003c\/td\u003e\n\u003ctd\u003eOEM reference for the TRX 420 Rancher OS 0.50 kit; widely recognized compatibility for 2007–2013 models.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13012-HP5-600\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003eDirect-fit aftermarket alternative; matches Honda 13012-HP5-600 in specs for the TRX 420 Rancher family.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eCross-reference notes confirm the OEM standard and its compatibility with the aftermarket OS 0.50 kit for the TRX 420 Rancher lineup.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eIn the box you’ll find the essential rings needed for a proper top-end seal restoration:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003eTop Compression Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eSecond Compression Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOil Control Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Related components such as the wrist pin, circlips, or gasket set are not included in this kit.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Aftermarket Replacement?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDirect-Fit Compatibility:\u003c\/b\u003e Precisely sized OS 0.50 rings are designed to match the TRX 420 bore and three-ring piston configuration for an effortless top-end refresh.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Verified interchange with Honda’s 13012-HP5-600, ensuring reliable fitment and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Premium alloy rings deliver improved wear resistance and seal durability in dirty, oil-filled environments typical of trail and farm use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores compression and reduces oil blow-by, returning throttle response and starting reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective:\u003c\/b\u003e A budget-friendly alternative to OEM parts without sacrificing essential fit or function.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrail- and Farm-Ready:\u003c\/b\u003e Built to withstand rugged, muddy, and dusty conditions common to Rancher-owner use cases.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePrepare the bore:\u003c\/b\u003e Verify bore size (OS 0.50 implies about a 0.50 mm increase) and clean the cylinder thoroughly to remove any debris or carbon buildup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRing orientation and gaps:\u003c\/b\u003e Install rings with correct orientation and stagger end gaps to promote even sealing; refer to service manual for guidance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRing compression:\u003c\/b\u003e Use an appropriate ring compressor to seat rings squarely into the piston grooves without distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLubrication:\u003c\/b\u003e Lightly coat rings and the bore with clean engine oil before installation to prevent first-run scuffing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClean assembly area:\u003c\/b\u003e Keep debris out of the crankcase and piston grooves during assembly; use lint-free rags and solvent as needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePost-install testing:\u003c\/b\u003e After assembly, perform a compression test and leak-down test; change the oil after an initial break-in period to flush any debris.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston ring set on the TRX 420 Rancher can allow oil to slip past the rings, lowering compression and increasing oil consumption. This OS 0.50 kit restores the original seal and ring geometry, helping the engine breathe cleanly again and delivering dependable starting and power under demanding trail or farm conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319263240566,"sku":"192.045H3","price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_84fd9002-483c-4ae4-9724-7336ec669ef1.png?v=1774886132","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-420-rancher-os-0-50-2007-2013","provider":"DGT Agri","version":"1.0","type":"link"}