{"product_id":"piston-kit-honda-trx-350-os-0-25-2000-2006","title":"OS 0.25 Piston Kit For Honda TRX 350 2000 2001 2002 2003 2004 2005 2006 OEM Replacement 13102HN5670","description":"\u003cdiv\u003e\n\u003cp\u003eOS 0.25 Piston Kit for Honda TRX 350 (years 2000–2006) is an aftermarket replacement designed to restore compression and rebuild peak power for the TRX350 engine family. Specifically suited for Honda TRX350FE, TRX350FM, TRX350TE, and TRX350TM variants, this kit is machined to precise bore tolerances to maintain consistent performance between rebuilds. It’s the smart choice when you’re renewing a worn top end and chasing reliable, field-ready power on the trail or farm.\u003c\/p\u003e\n\u003cp\u003eThis oversize +0.25mm piston kit delivers a reliable, durable option for riders who push their machines hard in tough conditions. Worn piston rings, scored cylinders, and degraded combustion can sap throttle response and fuel economy; this aftermarket replacement is engineered to restore tight ring seal, reduce oil consumption, and sustain steady compression under load. Built to match the TRX350 bore, it provides predictable performance and long-lasting reliability for active trail and utility use.\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\u003eTRX350FE Sportrax (4x4 ES)\u003c\/td\u003e\n\u003ctd\u003e2000–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX350FM Sportrax (4x4 S)\u003c\/td\u003e\n\u003ctd\u003e2000–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX350TE (2x4 ES)\u003c\/td\u003e\n\u003ctd\u003e2000–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX350TM (2x4)\u003c\/td\u003e\n\u003ctd\u003e2000–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\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\u003e13102-HN5-670\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit (OS oversize 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 350 (2000–2006)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003e78.75 mm (+0.25 oversize; OEM bore ~78.50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Material\u003c\/td\u003e\n\u003ctd\u003eForged aluminum (high-silicon, low-expansion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Head Type\u003c\/td\u003e\n\u003ctd\u003eDome with cavity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Height\u003c\/td\u003e\n\u003ctd\u003eApprox. 15.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWrist Pin Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e17.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Height\u003c\/td\u003e\n\u003ctd\u003eApprox. 57.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStroke\u003c\/td\u003e\n\u003ctd\u003eApprox. 68.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\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: 21.0398%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 24.267%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 53.9711%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.0398%;\"\u003e13102-HN5-670\u003c\/td\u003e\n\u003ctd style=\"width: 24.267%;\"\u003eHonda \/ OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.9711%;\"\u003eDirect OEM reference for TRX350 Rancher 2000–2006; aftermarket replacement aligns with this spec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.0398%;\"\u003e13101-HN5-670\u003c\/td\u003e\n\u003ctd style=\"width: 24.267%;\"\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd style=\"width: 53.9711%;\"\u003eAlternative aftermarket reference used by some vendors; provides a compatibility note with the same bore family\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\u003eA concise package designed to renew your top end.\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\u003cb\u003eWrist Pin\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eCir Clips\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Related top-end gasket sets or additional seals are not included unless specified in a separate listing.\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 Engineered to match the TRX350 bore and wrist pin dimensions for a trouble-free install.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Clear cross-reference support with Honda’s TRX350 specifications to ensure dependable replacement compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Forged aluminum construction delivers strength with controlled expansion under heat, helping maintain ring seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecise Oversize Fit:\u003c\/b\u003e Oversize +0.25 mm restores compression and power without sacrificing reliability on high-mileage engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores throttle response, consistent power delivery, and smoother combustion across the TRX350 family.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability in Tough Conditions:\u003c\/b\u003e Built for trail and farm use where heat and load cycles are frequent resistors to wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFollow the service manual: inspect bore condition and verify bore diameter before installation.\u003c\/li\u003e\n\u003cli\u003eUse a proper ring compressor and ensure rings are installed in the correct orientation with gaps offset from each other.\u003c\/li\u003e\n\u003cli\u003eLubricate the piston skirts and rings with engine oil during assembly; lightly oil the wrist pin and circlips before seating.\u003c\/li\u003e\n\u003cli\u003eCheck ring end gaps as per the kit’s recommended specification and adjust if required by machinist guidance.\u003c\/li\u003e\n\u003cli\u003eClean and inspect the cylinder and head surfaces; replace or verify the head gasket and ensure proper seating of the cylinder.\u003c\/li\u003e\n\u003cli\u003eReassemble using the service manual torque specs and break-in procedures to seat rings and rings lands properly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston kit in a TRX 350 can lead to compression loss, reduced power, and tougher starts, especially under load on trails or in agricultural work. Upgrading to this OS oversize piston kit restores compression integrity, improves throttle response, and revives dependable performance for reliable, long days in the field.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319258980726,"sku":"190.10007-1","price":118.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_232510030.png?v=1774886125","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-honda-trx-350-os-0-25-2000-2006","provider":"DGT Agri","version":"1.0","type":"link"}