{"product_id":"piston-kit-honda-trx-500-foreman-os-0-50-2005-2011","title":"OS 0.50 Piston Kit For Honda TRX 500 Foreman Rubicon 2005 To 2011 OEM Replacement Parts","description":"\u003cdiv\u003e\n\u003cp\u003eThis OS 0.50 Piston Kit is an aftermarket replacement designed specifically for the Honda TRX 500 Foreman and Rubicon line, covering 2005 through 2011 models. It features a +0.50 mm oversize bore to restore compression and bring the engine back toward its original power characteristics after wear. Engineered to meet or exceed Honda tolerances, this kit is built to withstand the rigors of trail riding and farm duty while delivering reliable, consistent performance on the job.\u003c\/p\u003e\n\u003cp\u003eThe value of this replacement goes beyond mere parts swap: the oversize piston compensates for bore wear, helping to maintain effective sealing, steady compression, and strong low-to-mid RPM response. Constructed as a forged alloy piston, it emphasizes durability and long-term reliability under demanding use, making it a sound choice for riders who push their Foreman\/Rubicon machines on dirt trails or rural work.\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\u003eTRX500FM Foreman 4x4\u003c\/td\u003e\n\u003ctd\u003e2005–2011\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX500FE Foreman ES\u003c\/td\u003e\n\u003ctd\u003e2005–2011\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX500FPE Foreman EPS\u003c\/td\u003e\n\u003ctd\u003e2007–2011\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX500FPM Foreman 4x4 EPS\u003c\/td\u003e\n\u003ctd\u003e2007–2011\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX500TM Foreman 2x4\u003c\/td\u003e\n\u003ctd\u003e2005–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eNotes: Fits are aligned with the Foreman\/Rubicon 500 platforms across the listed years, ensuring compatibility with the 0.50 mm oversize piston kit for proper compression restoration.\u003c\/p\u003e\n\u003cp\u003eSource alignment: model and year coverage reflects aftermarket references for TRX500 Foreman\/Rubicon 2005–2011 variants.\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\u003e13103-HP0-A00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit 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 Foreman \/ Rubicon (2005–2011)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eForged alloy piston\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Oversize\u003c\/td\u003e\n\u003ctd\u003e+0.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAdditional context: forged alloy pistons are commonly chosen for aftermarket OS kits to balance strength with light weight, helping maintain ring sealing and piston stability under load.\u003c\/p\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: 22.0217%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 18.9299%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 58.3265%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0217%;\"\u003e13103-HP0-A00\u003c\/td\u003e\n\u003ctd style=\"width: 18.9299%;\"\u003eOEM Honda\u003c\/td\u003e\n\u003ctd style=\"width: 58.3265%;\"\u003eOriginal equipment reference for TRX500 Foreman\/Rubicon (2005–2011).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.0217%;\"\u003e13103-HR0-F00\u003c\/td\u003e\n\u003ctd style=\"width: 18.9299%;\"\u003eOEM Honda\u003c\/td\u003e\n\u003ctd style=\"width: 58.3265%;\"\u003eAlternative OEM reference found in some markets; OS 0.50 compatibility noted in cross-reference sources.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese cross-reference entries help validate compatibility across regional Honda part catalogs and confirm the aftermarket kit aligns with established OEM references.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eOS 0.50 Piston Kit contents tested and packaged for installation compatibility include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePiston\u003c\/b\u003e with OS +0.50 mm oversize\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRings\u003c\/b\u003e matched to the piston\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eWrist Pin\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCirclips\u003c\/b\u003e for wrist pin retention\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Related top-end components such as the cylinder, head gasket, or other seals are not listed as included and may be required separately depending on your rebuild needs.\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 matched to Honda TRX500 Foreman\/Rubicon models from 2005–2011 for a straightforward install.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Cross-referenced with Honda OEM part numbers to ensure proper fit and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Forged alloy piston designed for durability and reliable sealing under heavy use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores compression and power lost from bore wear, returning engine response to near-original levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrail- and Farm-Ready:\u003c\/b\u003e Built to withstand rugged terrain and demanding workloads common on trails and rural properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Alternative:\u003c\/b\u003e A practical, cost-conscious option compared to OEM replacements without compromising essential specs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify bore condition and determine if cylinder honing or boring is required to properly accept the +0.50 mm oversize piston.\u003c\/li\u003e\n\u003cli\u003eLubricate the piston, rings, and wrist pin with assembly lube before insertion to prevent dry starts.\u003c\/li\u003e\n\u003cli\u003eInstall piston rings with correct orientation and stagger ring gaps (do not align gaps vertically) to optimize sealing.\u003c\/li\u003e\n\u003cli\u003eEnsure wrist pin is fully seated and the circlips are securely installed to avoid wrist pin movement during operation.\u003c\/li\u003e\n\u003cli\u003eReplace base and head gaskets as part of the rebuild and clean all mating surfaces to ensure a proper seal.\u003c\/li\u003e\n\u003cli\u003eFollow a cautious break-in procedure after installation to seat rings and establish proper ring seating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston kit on a Honda TRX 500 Foreman\/Rubicon can lead to compression loss, reduced power, and uneven combustion, which degrades drivability on trails and in field work. Upgrading to the OS 0.50 piston kit restores compression, sharpens throttle response, and rebuilds reliable performance for tough terrain and daily farm tasks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319259275638,"sku":"190.10008-2","price":128.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_231504224.png?v=1774886125","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-honda-trx-500-foreman-os-0-50-2005-2011","provider":"DGT Agri","version":"1.0","type":"link"}