{"product_id":"piston-kit-honda-trx-350-os-0-50-2000-2006","title":"Piston Kit OS 0.50 For Honda TRX 350 2000-2006 Fits Models TRX 350 OEM Replacement","description":"\u003cdiv\u003e\n\u003cp\u003eOS 0.50 Piston Kit for Honda TRX350 Rancher (2000–2006) is a purpose-built aftermarket replacement designed to restore compression and power across the full TRX350 generation. The 0.50 mm oversize bore targets the standard TRX350 cylinder (79.00 mm) to deliver reliable top-end performance and durable sealing during a proper rebuild of the piston, rings, and seating surfaces. This kit is engineered as a direct, OE-style substitute from Aftermarket Replacement, offering factory-like fit and long-lasting durability without OEM branding.\u003c\/p\u003e\n\u003cp\u003eBuilt for trail and farm work alike, this OS 0.50 kit addresses common wear: ring gaps close, rings lose tension, and compression slowly declines with miles of tough riding. The forged MOS2-coated piston and precisely machined components are chosen to maintain oil control and heat management under heavy loads, making it a dependable choice for Rancher engines that see regular hard use or extended hill climbs.\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-FM \/ FE 350 Rancher (TRX350FM \/ TRX350FE)\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\u003eTRX-TM \/ TE 350 Rancher (TRX350TM \/ TRX350TE)\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\u003eTRX350FE Rancher ES 4x4\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 Rancher 4x4\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 Rancher ES 4x4\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 Rancher 4x4\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\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-HN5-670\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit (0.50 mm oversize)\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 TRX350 Rancher 2000–2006 (TRX350FM\/FE 4x4; TRX350TM\/TE 2x4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore\u003c\/td\u003e\n\u003ctd\u003e79.00 mm (0.50 mm over standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003e+0.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial \/ Construction\u003c\/td\u003e\n\u003ctd\u003eForged aluminum with MoS2 coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eMoS2 (molybdenum disulfide)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment Years\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\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: 21.426%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 16.4801%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 61.3718%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.426%;\"\u003e13103-HN5-670\u003c\/td\u003e\n\u003ctd style=\"width: 16.4801%;\"\u003eHonda OEM\u003c\/td\u003e\n\u003ctd style=\"width: 61.3718%;\"\u003eDirect OEM reference mapped to this OS 0.50 piston kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.426%;\"\u003e01.1480.050\u003c\/td\u003e\n\u003ctd style=\"width: 16.4801%;\"\u003ePro-X\u003c\/td\u003e\n\u003ctd style=\"width: 61.3718%;\"\u003eOEM Replacement; bore 79.00 mm; 0.50 mm oversize; cross-references to multiple Honda OEM numbers in catalogues\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.426%;\"\u003e13101-HN5-670\u003c\/td\u003e\n\u003ctd style=\"width: 16.4801%;\"\u003eHonda OEM\u003c\/td\u003e\n\u003ctd style=\"width: 61.3718%;\"\u003eAlternate OEM reference used for similar 0.50 oversize kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.426%;\"\u003e4933M07950\u003c\/td\u003e\n\u003ctd style=\"width: 16.4801%;\"\u003eWiseco\u003c\/td\u003e\n\u003ctd style=\"width: 61.3718%;\"\u003e79.50 mm oversize kit for TRX350 Rancher; cross-reference to 79.50 mm bore variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 21.426%;\"\u003e8871D050\u003c\/td\u003e\n\u003ctd style=\"width: 16.4801%;\"\u003eWossner\u003c\/td\u003e\n\u003ctd style=\"width: 61.3718%;\"\u003e79.00 mm OS 0.50 piston kit; cross-reference to other oversizes in TRX350 line\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 piston kit is designed for a precise top-end rebuild and includes the essential components required to restore compression and performance in the TRX350 family.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePiston\u003c\/b\u003e (0.50 mm oversize, MoS2-coated, forged aluminum)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRings\u003c\/b\u003e (ring pack matched to bore and oversize)\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePiston 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\u003eGaskets, seals, and other related hardware are not included and should be sourced separately per service manual requirements.\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—specifically designed to replace the TRX350 Rancher piston kit without modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference\u003c\/b\u003e—mapped to Honda OEM references for reliable cross-compatibility with established service catalogs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials\u003c\/b\u003e—forged aluminum piston with MoS2 coating to improve durability and heat management in high-load top-end rebuilds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration\u003c\/b\u003e—restores original compression and power, helping the engine recover factory-like response and throttle pick-up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective\u003c\/b\u003e—a practical aftermarket option that delivers OEM-style performance at a lower overall cost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrusted Aftermarket Quality\u003c\/b\u003e—manufactured by Aftermarket Replacement to meet technicians’ expectations for a top-end rebuild.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThoroughly clean the cylinder bore and inspect for scoring before install; remove any burrs to ensure a proper seal.\u003c\/li\u003e\n\u003cli\u003eVerify bore size is exactly 79.00 mm and confirm the oversize is +0.50 mm to match the piston kit specification.\u003c\/li\u003e\n\u003cli\u003eInstall rings with properly staggered end gaps to avoid compression leaks and blow-by; ensure correct orientation relative to front\/back of the engine.\u003c\/li\u003e\n\u003cli\u003eLubricate the piston, rings, and wrist pin with assembly lube prior to final assembly to prevent dry start.\u003c\/li\u003e\n\u003cli\u003eInstall circlips securely and verify the wrist pin is captive; avoid bending or twisting during fitment.\u003c\/li\u003e\n\u003cli\u003eFollow the TRX350 service manual for torque specs and head\/connecting rod fasteners during reassembly; perform a careful break-in procedure after start-up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston in the TRX350 can lead to a loss of compression, reduced power, and uneven combustion, increasing blow-by and the risk of oil consumption. This OS 0.50 piston kit restores compression and peak-end power, delivering reliable, predictable performance and a longer-lasting seal for the Rancher’s top end.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319259013494,"sku":"190.10007-2","price":128.33,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_232233469.png?v=1774886125","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-honda-trx-350-os-0-50-2000-2006","provider":"DGT Agri","version":"1.0","type":"link"}