{"product_id":"piston-ring-kit-honda-trx-420-rancher-os-0-75-2007-2013","title":"Honda TRX 420 Rancher Piston Ring Kit OS 0.75 2007 To 2013 Top End Overbore Set","description":"\u003cdiv\u003eOS 0.75 piston ring kit designed specifically for the Honda TRX 420 Rancher family (2007–2013). This top-end refresh targets a bored cylinder to renew the piston-to-bore seal, restore compression, and reduce oil consumption without the expense or downtime of a full piston kit. Crafted as a precise aftermarket replacement, it brings factory-like performance back to dusty trails and demanding farm work. Over time, worn rings allow blow-by and power loss, especially in engines that spend long days under load in dirt and dust. This OS 0.75 kit re-establishes seal integrity between piston and bore, helping reclaim throttle response and long-term reliability for riders who rely on their Rancher for hard work and field duties.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e\u003c\/h3\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\u003eTRX 420 Rancher (TRX420 family including 4x4 and 2x4 variants)\u003c\/td\u003e\n\u003ctd\u003e2007–2013; 86.50 mm standard bore; OS +0.75 (87.25 mm) for top-end overbore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 420 Rancher ES\/Automatic and Manual variants\u003c\/td\u003e\n\u003ctd\u003e2007–2013; applicable to electric-start and manual transmissions across model lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 420 Rancher (All listed sub-models)\u003c\/td\u003e\n\u003ctd\u003e2007–2013; designed to fit standard 86.50 mm bore engines with oversize options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNotes: This compatibility reflects common TRX420 Rancher configurations used in farming and trail work during the 2007–2013 window. Always verify bore size on your specific machine before ordering.\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\u003e13013-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 0.75 mm)\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\u003eStandard Bore\u003c\/td\u003e\n\u003ctd\u003e86.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003e+0.75 mm (OS 0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Bore (Oversize)\u003c\/td\u003e\n\u003ctd\u003e87.25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Configuration\u003c\/td\u003e\n\u003ctd\u003eTop Compression Ring; Second Compression Ring; Oil Ring Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-grade steel rings with wear-resistant coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNotes\u003c\/td\u003e\n\u003ctd\u003eIncludes rings only; piston, wrist pin, circlips, base gasket, and head gaskets are not included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\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\u003e13013-HP5-600\u003c\/td\u003e\n\u003ctd\u003eHonda OEM\u003c\/td\u003e\n\u003ctd\u003eOS 0.75 piston ring kit; cross-reference with aftermarket options such as 13011-HP5-600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13011-HP5-600\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003e0.25 mm oversize alternative and standard cross-reference in many aftermarket catalogs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13012-HP5-600\u003c\/td\u003e\n\u003ctd\u003eHonda OEM\u003c\/td\u003e\n\u003ctd\u003eOS 0.50 oversize reference for TRX420 configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13010-HP5-600\u003c\/td\u003e\n\u003ctd\u003eHonda OEM \/ Aftermarket\u003c\/td\u003e\n\u003ctd\u003ePiston Rings used in related top-end kits; cross-reference in rebuild subsets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eThis kit includes the essential rings required to refresh one piston for the TRX 420 Rancher OS 0.75 application.\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 Ring Assembly\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Piston, wrist pin, circlips, base gasket, and cylinder head gaskets are not included.\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 engineered to match the TRX 420 Rancher bore and ring stack for a seamless top-end refresh.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Backed by accurate OEM references to ensure the correct oversize option for your model year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e High-grade steel rings with wear-resistant coatings designed for rugged trail and farm use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores compression and power without the downtime or cost of a full piston kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReliability Under Duress:\u003c\/b\u003e Built to withstand dusty environments and hard use common to Rancher applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAftermarket Assurance:\u003c\/b\u003e Engineered to meet or exceed OEM tolerances for longevity and consistent seal life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the bore for scoring and ensure it’s within service limits before installing the oversize rings.\u003c\/li\u003e\n\u003cli\u003eConfirm correct ring orientation and order; keep gaps staggered to minimize blow-by paths.\u003c\/li\u003e\n\u003cli\u003eUse a ring expander to avoid ringing or nicking corners when installing the compression rings.\u003c\/li\u003e\n\u003cli\u003eApply clean engine oil to the rings and wipe the piston lands to prevent bonding or ring sticking.\u003c\/li\u003e\n\u003cli\u003eCheck end gaps and rotate the piston to verify smooth ring seating before final assembly.\u003c\/li\u003e\n\u003cli\u003eTake care to clean all debris from the cylinder bore and ensure proper lubrication during initial startup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eWorn piston rings on a TRX 420 Rancher lead to increased blow-by, reduced compression, and higher oil consumption. This OS 0.75 replacement restores sealing integrity, reclaiming power, throttle response, and long-term reliability without resorting to a full engine rebuild.\u003c\/p\u003e\nNote: Bore and oversize specifications reflect the intended OS 0.75 option for the TRX 420 Rancher 2007–2013 window, with bore sizing of 86.50 mm standard and 87.25 mm oversize when installed. These measurements align with documented 86.50 mm standard bores for the TRX420 platform and common oversize top-end practices, supporting a robust top-end refresh in dusty, field-use environments.\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319263273334,"sku":"192.045H4","price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_53bf1fa4-f817-4040-8919-5054504708a8.png?v=1774886131","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-420-rancher-os-0-75-2007-2013","provider":"DGT Agri","version":"1.0","type":"link"}