{"product_id":"piston-kit-honda-trx500-foreman-os-0-50-fa-fm-fe-2012-2019","title":"OS 0.50 Piston Kit Honda TRX500 Foreman FA 2015-2019 TRX500FE FM 2012-2019 TRX500FPE FPM 2012-2013 Pioneer 500 1000 2015-2023","description":"\u003cdiv\u003eOS 0.50 oversize piston kit for Honda TRX500 Foreman engines and Pioneer 500\/1000 engines. This oversize bore (+0.50 mm) restore compression and horsepower lost to wear, helping the engine regain quick throttle response and steady power under load. Precision‑machined to tight tolerances, it delivers a reliable seal and consistent ring wear across the listed TRX500 variants and Pioneer models. Designed as an aftermarket replacement that meets or exceeds OEM specifications, it supports dependable performance in rebuilds and routine maintenance alike. This OS kit focuses on delivering enduring reliability in the harsh conditions of trail work and farm use. By restoring lost displacement and tightening up clearance, it minimizes piston slap and power drop after extended service, making it a practical, durable choice when you’re rebuilding or refreshing an aging TRX500 or Pioneer engine. Its oversize design is intentionally chosen to reestablish optimal compression and ring seating for dependable operation under load, mile after mile.\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\u003eTRX500 FA (Foreman)\u003c\/td\u003e\n\u003ctd\u003e2015–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX500 FE\/FM\u003c\/td\u003e\n\u003ctd\u003e2012–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX500 FPE\/FPM\u003c\/td\u003e\n\u003ctd\u003e2012–2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003ePioneer 500\/1000\u003c\/td\u003e\n\u003ctd\u003e2015–2023\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\u003e13103-HR0-F00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit\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 TRX500 FA (2015–2019); TRX500 FE\/FM (2012–2019); TRX500 FPE\/FPM (2012–2013); Pioneer 500\/1000 (2015–2023)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Size \/ Overbore\u003c\/td\u003e\n\u003ctd\u003e0.50 (oversize)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size (mm)\u003c\/td\u003e\n\u003ctd\u003e92.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStroke (mm)\u003c\/td\u003e\n\u003ctd\u003e71.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Material\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy\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\u003e13103-HR0-F00\u003c\/td\u003e\n\u003ctd\u003eOEM Honda\u003c\/td\u003e\n\u003ctd\u003eOriginal equipment reference for 92.50 mm oversize +0.50 kit used on TRX500 Foreman and Pioneer models.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50-215-05K\u003c\/td\u003e\n\u003ctd\u003eWSM (Aftermarket)\u003c\/td\u003e\n\u003ctd\u003eCross-reference to OEM 13103-HR0-F00; OS +0.50; 92.50 bore for Honda TRX500\/Pioneer applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40173M09250\u003c\/td\u003e\n\u003ctd\u003eWiseco (Aftermarket)\u003c\/td\u003e\n\u003ctd\u003eOS 0.50 Piston Kit with 92.50 mm bore; cross-reference to OEM 13103-HR0-F00; commonly used for TRX500 Foreman variants.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNA-10014-2\u003c\/td\u003e\n\u003ctd\u003eNamura (Aftermarket)\u003c\/td\u003e\n\u003ctd\u003e92.47 mm bore +0.50 oversize; compatible replacement option for TRX500 Foreman models.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\nThis piston kit includes:\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003ePiston\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePiston Rings\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePiston Wrist Pin\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eCirclips\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNot included: gaskets, seals, or additional engine hardware necessary for a full top-end rebuild.\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 machined to match OEM bore and pin dimensions for reliable sealing and consistent wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Uses the Honda OEM reference 13103-HR0-F00 as the baseline, with aftermarket cross-refs available for budget builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Designed from high-quality aluminum alloy to handle repeated heat cycles and heavy throws in trails and fields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOS 0.50 Oversize Precision:\u003c\/b\u003e Restores lost displacement and improves low-end torque without compromising reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEngine Rebuild Ready:\u003c\/b\u003e A practical choice for restoration projects on TRX500 Foreman and Pioneer models, delivering consistent performance post-rebuild.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Performance:\u003c\/b\u003e Provides OEM-comparable performance at a value-conscious price point for frequent maintenance cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThoroughly measure bore diameter and roundness before installation; oversize kits require proper honing to achieve a true 92.50 mm bore.\u003c\/li\u003e\n\u003cli\u003eAlways verify end-gap on rings and install them in the correct orientation for optimal seal and longevity.\u003c\/li\u003e\n\u003cli\u003eLubricate piston rings, wrist pin, and bearing surfaces with light engine oil or assembly lube before assembly.\u003c\/li\u003e\n\u003cli\u003eEnsure the wrist pin is seated securely with retaining clips on both sides if required by your engine variant.\u003c\/li\u003e\n\u003cli\u003eClean all components and mating surfaces; remove any debris from the cylinder and ring grooves to prevent scoring.\u003c\/li\u003e\n\u003cli\u003eFollow the service manual for exact torque specs and sequence when reassembling the top end and any related components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\nRunning a worn-out piston kit in these engines can lead to reduced compression, noticeable power loss, increased oil consumption, and the risk of piston seizure under heavy loads. Replacing with this OS 0.50 piston kit restores displacement, rebuilds compression, and returns consistent power delivery, improving reliability for demanding trail work or farm tasks.\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319522959734,"sku":"190.040K3","price":118.75,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/dfdsd_add17efe-7721-4472-8251-f21a295d39d9.png?v=1772051444","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-honda-trx500-foreman-os-0-50-fa-fm-fe-2012-2019","provider":"DGT Agri","version":"1.0","type":"link"}