{"product_id":"piston-kit-honda-trx-450-os-1-50","title":"Piston Kit OS 1.50 For Honda TRX 450 1998 2004 OEM Replacement Quality Fits TRX 450 Models","description":"\u003cdiv\u003e\n\u003cp\u003eRestore power and reliability to your Honda TRX450 with the OS 1.50 Piston Kit. Engineered for the 1998–2004 TRX450S Sportrax and the Foreman 4x4 family (S\/ES\/FE\/FM), this oversize kit brings worn bores back to optimal clearance for crisp combustion and lasting durability. The kit includes a forged aluminum piston, complete ring set, wrist pin, and circlips to deliver a dependable top-end rebuild that feels like new power on demanding trail or farm runs. The +1.50 mm oversize is designed to restore compression when cylinders show bore wear, ensuring consistent performance under load.\u003c\/p\u003e\n\u003cp\u003eDesigned for rugged in-field use, this aftermarket replacement leverages a forged aluminum piston to handle the heat and stress of heavy ATV use, delivering reliable power delivery during climbs, towing, or long trail days. It addresses worn rings and reduced sealing from cylinder wear, offering a cost-effective alternative to OEM replacements while preserving OEM-like performance and clearances for durable, predictable operation. Perfect for trail riders and farm work alike, it’s built to endure harsh conditions where a worn piston would otherwise sap performance and reliability.\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\u003eTRX450S Sportrax\u003c\/td\u003e\n\u003ctd\u003e1998–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX450ES Foreman 4x4\u003c\/td\u003e\n\u003ctd\u003e1998–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX450FE Foreman 4x4 ES\u003c\/td\u003e\n\u003ctd\u003e1998–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX450FM Foreman 4x4 S\u003c\/td\u003e\n\u003ctd\u003e1998–2004\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\u003e01.1498.150 (OS oversize), 01.1498.000 (standard bore)\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 TRX450S\/ES\/FE\/FM 1998–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eForged Aluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003e91.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003e+1.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplacement\u003c\/td\u003e\n\u003ctd\u003e432 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Ratio\u003c\/td\u003e\n\u003ctd\u003e9.5:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Wrist 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 style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 18.231%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 29.2225%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 51.8244%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 18.231%;\"\u003e01.1498.150\u003c\/td\u003e\n\u003ctd style=\"width: 29.2225%;\"\u003eHonda OEM Cross-Reference (OS Oversize)\u003c\/td\u003e\n\u003ctd style=\"width: 51.8244%;\"\u003eCross-references to Honda TRX450 piston assemblies; aligns with bore oversize +1.50 mm for 1998–2004 models. Includes references to OEM numbers such as 13010-HN0-A01 \/ 13010-HN0-A02 \/ 13101-HN0-A00 \/ 13111-HN0-A00 \/ 13112-MAT-000.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 18.231%;\"\u003e01.1498.000\u003c\/td\u003e\n\u003ctd style=\"width: 29.2225%;\"\u003eHonda OEM Cross-Reference (Standard Bore)\u003c\/td\u003e\n\u003ctd style=\"width: 51.8244%;\"\u003eStandard-bore reference for TRX450 engines of the same generation; aligns with OEM cross-references listed above as applicable to stock bore restorations.\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\u003eEach box contains the components below to complete a precise top-end rebuild.\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\u003eCirclips\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Gaskets, seals, and other cylinder head components are not included in this kit.\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 engineered to match the bore and clearance requirements of 1998–2004 Honda TRX450S\/ES\/FE\/FM engines for a clean, reliable install.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference Availability:\u003c\/b\u003e Clear cross-reference numbers help you verify compatibility with OEM setups and alternate aftermarkets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Forged aluminum piston delivers strength and durability under heavy-use ATV conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores original compression and sealing, reclaiming lost power from cylinder wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Reliability:\u003c\/b\u003e A practical upgrade that sidesteps OEM price spikes while maintaining factory-like performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAll-In-One Rebuild Package:\u003c\/b\u003e Includes piston, rings, wrist pin, and circlips for a complete top-end refresh.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify cylinder bore size before ordering; oversize +1.50 mm requires a corresponding bore rework to 91.50 mm for proper fit.\u003c\/li\u003e\n\u003cli\u003eMeasure and confirm piston orientation markings (arrow) align with the engine’s forward direction during assembly.\u003c\/li\u003e\n\u003cli\u003eUse appropriate engine assembly lube on the piston skirts and rings to prevent dry start and scuffing.\u003c\/li\u003e\n\u003cli\u003eInspect the cylinder for wear or scoring; de-glaze or re-bore as needed to achieve true roundness and crosshatch finish.\u003c\/li\u003e\n\u003cli\u003eInstall the piston rings with correct orientation and staggered gaps; ensure ring end gaps do not align across the engine.\u003c\/li\u003e\n\u003cli\u003eInstall the wrist pin and secure with the circlips, confirming proper retention before final assembly and torque procedures for surrounding components (cylinder head, crankcases, etc.).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eA worn piston loses compression and power, increases blow-by, and accelerates oil consumption. Upgrading to this OS 1.50 piston kit restores proper sealing and combustion clearance, delivering reliable performance across rugged trails or demanding farm work while protecting the engine from further bore damage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319258620278,"sku":"190.10000-6","price":140.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_234301094.png?v=1774886126","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-honda-trx-450-os-1-50","provider":"DGT Agri","version":"1.0","type":"link"}