{"product_id":"piston-kit-honda-trx-250-os-0-50-2002-2023","title":"OS 0.50 Piston Kit For Honda TRX 250 2002-2023 OEM Replacement 06133-HM8-A40 Professional Grade","description":"\u003cdiv\u003e\n\u003cp\u003eOS oversize piston kit for Honda TRX 250 engines delivers a precise restoration of compression and top-end performance across the 2002–2023 TRX 250 lineup. This 0.50 over bore kit features a 68.5 mm bore designed to reclaim seal and ring seating on worn bores, restoring throttle response and power across a wide RPM range. It’s positioned as a reliable aftermarket replacement that aligns with OEM references for straightforward interchange and dependable rebuilds.\u003c\/p\u003e\n\u003cp\u003eAs the TRX 250 family accumulates hours, bore wear can sap compression and throttle feel. The OS 0.50 oversize kit reestablishes proper clearance and ring engagement, delivering consistent power and improved reliability for trail or farm use. Designed to align with commonly cited OEM references, it gives you a clear rebuild path without guesswork and keeps your engine performing like new under demanding conditions.\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\u003eTRX 250 EX Sportrax (TRX250EX)\u003c\/td\u003e\n\u003ctd\u003e2001–2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 250X Sportrax (TRX250X)\u003c\/td\u003e\n\u003ctd\u003e2009–2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 250 TE Recon\u003c\/td\u003e\n\u003ctd\u003e2003–2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 250 TM Recon\u003c\/td\u003e\n\u003ctd\u003e2003–2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 250 engine family (TRX 250)\u003c\/td\u003e\n\u003ctd\u003e2002–2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cspan\u003eFitment notes and cross-reference confirmations drawn from OEM cross-reference listings for TRX 250 piston kits. \u003c\/span\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\u003e06133-HM8-A40; 06131-HM8-A40; 13101-HM8-A40; 13101-HN6-000\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\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore\u003c\/td\u003e\n\u003ctd\u003e68.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003eOS +0.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContents (typical kit inclusions)\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Piston Pin, Circlips\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\u003e06131-HM8-A40\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003ctd\u003eCross-referenced with 13101-HM8-A40 and 13101-HN6-000 for 68.5 mm OS kits; commonly listed in 50-229K style piston kit references.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13101-HM8-A40\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003ctd\u003eRelated to 06131-HM8-A40; used in multiple TRX 250 oversize kit configurations.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13101-HN6-000\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003ctd\u003eCross-referenced in cylinder\/piston kit assemblies; appears in listings alongside 12100-series cylinder references.\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 OS oversize piston kit typically includes the core components needed for a top-end refresh:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003ePiston\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eRings\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePiston Pin\u003c\/b\u003e (Wrist Pin)\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eCirclips\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ci\u003eNote: Gaskets, seals, and related hardware are not included with the piston kit alone and may be sold separately or as part of a full cylinder rebuild kit.\u003c\/i\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 with Honda TRX 250 engines, leveraging common OEM cross-references to simplify interchange.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference Alignment\u003c\/b\u003e ensures a reliable rebuild path without guesswork or custom machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Build for Harsh Duty\u003c\/b\u003e engineered to withstand heat and high RPMs typical of trail and farm use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRestored Top-End Performance\u003c\/b\u003e designed to reclaim compression and throttle response lost to bore wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Rebuild Route\u003c\/b\u003e offers a reliable aftermarket alternative to costly OEM packages while preserving engine performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTRX 250 Engine Family Focus\u003c\/b\u003e tuned specifically for the 2002–2023 TRX 250 model range, maintaining proper ring seating and piston-pin alignment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eNotes: This replacement is built to OEM-style tolerances and cross-reference data to fit the TRX 250 family.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the entire bore for taper, taper wear, and ovality; if wear exceeds spec, consider a full cylinder bore repair in addition to the oversize piston kit.\u003c\/li\u003e\n\u003cli\u003eUse a proper ring compressor and ensure correct ring orientation before installation; verify ring gaps per OEM-derived specifications for OS kits.\u003c\/li\u003e\n\u003cli\u003eLubricate the piston and rings with assembly lube before sliding the piston into the bore to prevent micro-seizures on initial startup.\u003c\/li\u003e\n\u003cli\u003eVerify the wrist pin and circlips are seated fully; ensure no burrs or debris remain in the rod or receiving lands.\u003c\/li\u003e\n\u003cli\u003eReplace companion gaskets and seals when reassembling to prevent leaks; double-check the head and base gaskets for damage or wear.\u003c\/li\u003e\n\u003cli\u003eTorque all fasteners to the manufacturer-recommended specs and recheck torque after the first heat cycle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston kit in a TRX 250 can lead to reduced compression, sluggish throttle response, and uneven power delivery, especially under load or when climbing hills. This OS oversize replacement restores proper seal and clearance, delivering reliable power and consistent performance across riding conditions, year after year.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319259963766,"sku":"190.10026-2","price":93.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_225819410.png?v=1774886125","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-honda-trx-250-os-0-50-2002-2023","provider":"DGT Agri","version":"1.0","type":"link"}