{"product_id":"honda-trx-500-rings-kit-trx-500-foreman-os-0-25","title":"Honda TRX 500 Foreman Piston Ring Kit OS 0.25 Fits TRX 500 FA FE FM FPE FPM 2005 Through 2019","description":"\u003cdiv\u003ePiston ring kit OS 0.25 for the TRX 500 Foreman engine family restores seal and compression between the piston and cylinder, bringing the engine back to crisp, reliable performance. It fits Foreman FA\/FE\/FM\/FPE\/FPM models from 2005 through 2019, renewing power across trails and fieldwork with a precise chrome-plated steel ring set designed to withstand harsh use. By renewing the top, second compression, and oil rings, this kit helps reduce blow-by, lowers oil consumption, and restores consistent combustion without OEM pricing.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis aftermarket replacement is engineered to address common wear scenarios: worn rings allow compression loss, oil burns, and power fades, especially after long service in dusty, muddy, or heavy-duty conditions. The OS 0.25 kit provides a direct-fit solution that mirrors OEM specifications for a dependable seal, predictable starts, and steady performance under load—ideal for riders who rely on their Foreman for daily work or weekend excursions without chasing OEM parts.\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 500 FA (Foreman)\u003c\/td\u003e\n\u003ctd\u003e2005-2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 500 FE (Foreman 4x4)\u003c\/td\u003e\n\u003ctd\u003e2005-2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 500 FM (Foreman 4x4)\u003c\/td\u003e\n\u003ctd\u003e2005-2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 500 FPE\u003c\/td\u003e\n\u003ctd\u003e2005-2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 500 FPM\u003c\/td\u003e\n\u003ctd\u003e2005-2013\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-HP0-A01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Set (OS 0.25)\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 500 Foreman FA\/FE\/FM\/FPE\/FPM (2005-2019); FPE\/FPM (2005-2013)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eChrome-plated steel alloy for wear resistance and sealing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003eSTD 92 mm (verify exact bore before install)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003eOS 0.25\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 control ring\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 style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 17.87%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 16.9714%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 64.4366%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.87%;\"\u003e13011-HP0-A01\u003c\/td\u003e\n\u003ctd style=\"width: 16.9714%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.4366%;\"\u003eDirect OEM reference for the TRX 500 Foreman; OS 0.25 equivalent aftermarket option\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.87%;\"\u003e13011-P8F-A01\u003c\/td\u003e\n\u003ctd style=\"width: 16.9714%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.4366%;\"\u003eStd size ring set; cross-reference used for generation fitment notes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.87%;\"\u003e13011-RJA-004\u003c\/td\u003e\n\u003ctd style=\"width: 16.9714%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.4366%;\"\u003eReplacement lineage within the TRX 500 engine family; interchangeability guidance\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\nThis kit contains the essential rings required for one TRX 500 piston assembly:\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\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Pistons, wrist pins, keeping\/retaining clips, and 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 align with the TRX 500 Foreman engine design and OEM references for straightforward installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Aligns with Honda’s 13011-HP0-A01 lineage while offering a cost-effective OS 0.25 alternative.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Chrome-plated steel alloy provides improved wear resistance and sealing performance under harsh conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision Machining:\u003c\/b\u003e Machined to OEM tolerances to minimize blow-by and maintain consistent combustion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReliability in Rough Conditions:\u003c\/b\u003e Built to withstand trail mud, dust, and farm duty without premature ring wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Performance:\u003c\/b\u003e Restores power and efficiency at a fraction of OEM pricing, with dependable long‑term service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVerify bore size before install:\u003c\/b\u003e STD 92 mm is the standard; measure your cylinder bore to confirm compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCheck ring end gaps:\u003c\/b\u003e Compare gaps to OEM specs for OS 0.25 rings to prevent seizure or mis-seating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClean surfaces thoroughly:\u003c\/b\u003e Remove oil, carbon, and debris from the piston grooves and cylinder lands prior to assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLubricate rings during assembly:\u003c\/b\u003e Lightly oil the rings and piston skirt to prevent hanging on initial startup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInstall in correct orientation:\u003c\/b\u003e Ensure each ring is oriented with its marked side outward or as specified by the OEM guide.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSealant and gaskets:\u003c\/b\u003e Use fresh base and head gaskets where applicable; rings alone do not seal the entire top end without proper gaskets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\nRunning a worn piston ring set leads to compression loss, higher oil consumption, and unpredictable performance. Replacing with this OS 0.25 kit restores the piston-cylinder seal, reduces blow-by, and returns consistent power and reliable starts for tough riding conditions.\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319262978422,"sku":"192.045G2","price":26.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_0824a9bb-bfac-4a7d-8158-92102532f37d.png?v=1774886131","url":"https:\/\/dgtagri.co.uk\/products\/honda-trx-500-rings-kit-trx-500-foreman-os-0-25","provider":"DGT Agri","version":"1.0","type":"link"}