{"product_id":"piston-ring-kit-honda-trx-420-rancher-os-0-25-2007-2013","title":"OS 0.25 Piston Ring Kit for Honda TRX 420 Rancher 2007 2013 Engine Rebuild Fitment","description":"\u003cdiv\u003e\n\u003cp\u003eThis oversize piston ring kit is a precise rebuild solution for TRX 420 Rancher ATV engines from 2007 to 2013, engineered to restore peak compression and curb oil blow-by after years of wear. Designed specifically for an oversize bore of 0.25 mm, it delivers tighter sealing and improved combustion efficiency, helping your trail or farm work feel like-new again. By renewing the ring pack, this kit helps reclaim power, throttle response, and fuel economy without the sticker shock of OEM parts.\u003c\/p\u003e\n\u003cp\u003eWhat sets this aftermarket kit apart is its focused approach to common wear issues—ring groove wear, carbon buildup, and deteriorating piston seals—that gradually sap performance on older Rancher engines. Built as a reliable aftermarket replacement, it offers durable materials and a precise fit that translates to dependable sealing under demanding riding conditions, whether you’re carrying loads or navigating rugged terrain. The result is smoother operation, reduced oil consumption, and restored confidence during long days in the field.\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\u003eTRX420FA Rancher\u003c\/td\u003e\n\u003ctd\u003e2009-2014, 4x4 AT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420FE Rancher\u003c\/td\u003e\n\u003ctd\u003e2007-2013, 4x4 ES\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420FM Rancher\u003c\/td\u003e\n\u003ctd\u003e2007-2013, 2x4 Manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX420TE Rancher\u003c\/td\u003e\n\u003ctd\u003e2010-2013, ES with EPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\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\u003e13011-HP5-600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eOversize piston ring kit (OS 0.25mm)\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\u003eEngine rebuild for TRX 420 Rancher ATVs; improves cylinder sealing and compression\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-carbon steel with chrome-plated top ring for wear resistance and oil control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eOversize bore 0.25 mm; Standard bore 86.50 mm; Oversize bore 86.75 mm; Ring thickness 1.5–2.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize Specification\u003c\/td\u003e\n\u003ctd\u003e0.25 mm oversize (for honing-ready cylinders)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTension \/ Gap\u003c\/td\u003e\n\u003ctd\u003eEnd-gap specification 0.25–0.40 mm for proper sealing under high RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Ring Configuration\u003c\/td\u003e\n\u003ctd\u003eIncludes top ring, second ring, 2 x oil rings, and oil ring spacer\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\u003e13011-HP5-600\u003c\/td\u003e\n\u003ctd\u003eOEM Honda\u003c\/td\u003e\n\u003ctd\u003eOriginal equipment oversize ring set for TRX 420 Rancher; 0.25 mm oversize\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\u003eDirect-fit OS 0.25 mm ring set; same bore and fit as OEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13010-HP5-600\u003c\/td\u003e\n\u003ctd\u003eOEM Honda\u003c\/td\u003e\n\u003ctd\u003eStandard ring set (baseline bore for reference)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13012-HP5-600\u003c\/td\u003e\n\u003ctd\u003eOEM Honda\u003c\/td\u003e\n\u003ctd\u003eOversize ring set (0.50 mm) cross-reference for alternative bore options\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 components of the piston ring set for a proper engine rebuild:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePiston Ring Set\u003c\/b\u003e (includes all rings as a single assembly)\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eTop Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eSecond Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOil Ring\u003c\/b\u003e (x2)\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOil Ring Spacer\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: This kit does not include a piston, wrist pin, circlips, base gasket, head gasket, or other gaskets.\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 Engine rebuild-ready kit designed to fit the TRX 420 Rancher family without modifying the cylinder or bore.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Cross-referenced to the factory part numbers, ensuring correct specifications and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e High-carbon steel with chrome-plated top ring for superior wear resistance and oil control under heavy use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision Oversize Fit:\u003c\/b\u003e 0.25 mm oversize matches honed bores to restore proper ring-wall sealing and compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Reclaims lost power, throttle response, and fuel efficiency by renewing seal integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Alternative:\u003c\/b\u003e A dependable aftermarket option that delivers OEM-like performance at a lower price point.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMeasure and Prepare:\u003c\/b\u003e Inspect the bore for wear; hone to the 86.75 mm oversize if needed and verify ring groove condition before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEnd-Gap and Orientation:\u003c\/b\u003e Set ring end gaps to 0.25–0.40 mm and offset the top and second rings by 0.5–1.0 mm to minimize gas leakage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLubrication:\u003c\/b\u003e Apply a light coat of engine assembly lube to all rings and the piston skirts during assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRing Orientation:\u003c\/b\u003e Install rings in the correct orientation with the chamfers and stamped markings facing the correct direction; avoid twisting rings during placement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClean Assembly:\u003c\/b\u003e Clean the piston groove and bore thoroughly; keep debris away from the ring lands to prevent scoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFollow Break-In Guidelines:\u003c\/b\u003e After startup, avoid high RPM and heavy loads for a proper break-in period to seating the rings and ensure long-term sealing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eWorn piston rings allow blow-by, reduce compression, and increase oil consumption, which degrades power and reliability on rugged trails or demanding farm tasks. Upgrading to this OS 0.25 mm kit restores sealing and compression, delivering consistent performance and reduced oil use during tough work sessions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319263207798,"sku":"192.045H2","price":21.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_1e776f1a-bb94-435d-b025-8237e92e3f01.png?v=1774886131","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-420-rancher-os-0-25-2007-2013","provider":"DGT Agri","version":"1.0","type":"link"}