{"product_id":"piston-ring-kit-honda-trx-450-os-1-00-1998-2004","title":"Piston Ring Kit OS 1.00 For Honda TRX 450 ATV 1998-2004 High-Performance Engine Restoration Fitment","description":"\u003cdiv\u003e\n\u003cp\u003eThis oversize OS 1.00 piston ring kit is engineered for Honda TRX 450 ATVs from 1998 through 2004, delivering a precise seal in a bored cylinder to restore peak compression and curb oil consumption. Designed to address power loss, sluggish throttle response, and blue smoke, it helps your trail or farm machine reclaim its original performance without a full engine rebuild. The OS 1.00 sizing ensures a perfect fit after boring, restoring compression ratios for reliable operation on rugged terrain.\u003c\/p\u003e\n\u003cp\u003eAs a robust aftermarket replacement, this kit focuses on worn ring lands and blow-by common in high-load, off-road use. The chrome-plated top ring and high-carbon steel construction are designed to resist heat and wear, delivering durable sealing under demanding conditions. It’s a dependable choice for trail riders and agriculture work where long-term reliability and cost-effective maintenance matter.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Vehicle Fitment\u003c\/h3\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 17.509%;\"\u003eManufacturer\u003c\/th\u003e\n\u003cth style=\"width: 25.0845%;\"\u003eModels \/ Series\u003c\/th\u003e\n\u003cth style=\"width: 56.6845%;\"\u003eYears \/ Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.509%;\"\u003eHonda\u003c\/td\u003e\n\u003ctd style=\"width: 25.0845%;\"\u003eTRX 450 Foreman FE (4x4)\u003c\/td\u003e\n\u003ctd style=\"width: 56.6845%;\"\u003e1998-2001; Standard models with possible engine rebuilds requiring OS 1.00 rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.509%;\"\u003eHonda\u003c\/td\u003e\n\u003ctd style=\"width: 25.0845%;\"\u003eTRX 450 Foreman ES \/ FM (Electric Shift)\u003c\/td\u003e\n\u003ctd style=\"width: 56.6845%;\"\u003e1998-2004; Includes variants with upgraded transmissions, compatibility for engines bored to OS 1.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.509%;\"\u003eHonda\u003c\/td\u003e\n\u003ctd style=\"width: 25.0845%;\"\u003eTRX 450 Foreman S\u003c\/td\u003e\n\u003ctd style=\"width: 56.6845%;\"\u003e1998-2004; Utility models used in farming or trail riding, where ring wear from heavy loads is common\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\u003e13014-HN0-A01, 13014-HN0-A02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Kit, Oversize (OS 1.00)\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\u003eEngine rebuild for Honda TRX 450 ATVs; cylinders bored to OS 1.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-carbon steel with chrome-plated top ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eOversize +1.00 mm; post-bore 94 mm; ring thickness ~1.5–2.0 mm per ring; set includes 3 rings per piston\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize Specification\u003c\/td\u003e\n\u003ctd\u003eOS 1.00 (1.00 mm over standard bore)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size Compatibility\u003c\/td\u003e\n\u003ctd\u003eDesigned for 94 mm bore post-bore on TRX 450 engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Set Composition\u003c\/td\u003e\n\u003ctd\u003eTop compression ring; Second compression ring; Oil control ring\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\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\u003e13014-HN0-A01\u003c\/td\u003e\n\u003ctd\u003eHonda OEM\u003c\/td\u003e\n\u003ctd\u003eOriginal Honda part reference; OS 1.00 ring set for TRX450 Foreman\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13014-HN0-A02\u003c\/td\u003e\n\u003ctd\u003eHonda OEM\u003c\/td\u003e\n\u003ctd\u003eAlternate OEM reference for slight revision; same OS 1.00 application\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\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eThis OS 1.00 piston ring kit includes the following components in the box:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003eTop compression ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eSecond compression ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOil control ring\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ci\u003eNote: Related items such as pistons, gaskets, and circlips are not included.\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 Designed to align with Honda TRX 450 Foreman engines bored to OS 1.00, ensuring straightforward installation without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Uses Honda reference numbers 13014-HN0-A01 \/ A02 for accurate matching with factory specs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e High-carbon steel core with chrome-plated top ring for enhanced wear resistance and heat tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision Oversize Solution:\u003c\/b\u003e OS 1.00 precisely matches engines bored 1.00 mm over stock, restoring sealing surfaces and compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Reclaims compression, reduces blow-by, and curbs oil consumption for reliable off-road performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Reliability:\u003c\/b\u003e Aftermarket replacement that delivers durable performance without OEM-price premium.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePrep and inspection:\u003c\/b\u003e Inspect the cylinder bore for scoring and verify it is accurately bored to 94 mm before installing OS 1.00 rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCleanliness:\u003c\/b\u003e Thoroughly clean all ring lands and oil grooves; remove carbon buildup to ensure proper sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLubrication:\u003c\/b\u003e Lightly coat rings and the piston skirt with clean engine oil before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrientation:\u003c\/b\u003e Install rings in the correct order (top compression, second compression, and oil control) with the gaps staggered per standard practice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEnd-gap checks:\u003c\/b\u003e Check end gaps with the manufacturer's recommended feeler gauge; ensure gaps are within spec to avoid ring sticking or blow-by.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBreak-in awareness:\u003c\/b\u003e After assembly, follow proper break-in practices to seat the rings and restore seal integrity under load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eWorn piston rings allow blow-by, leading to reduced compression and higher oil consumption. Replacing with this OS 1.00 kit restores sealing efficiency and compression, delivering dependable power and oil control for your Honda TRX 450 in tough off-road conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319262421366,"sku":"192.04545","price":22.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_5b7e1d30-4904-4f82-9554-8e3f65dd71fc.png?v=1774886131","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-450-os-1-00-1998-2004","provider":"DGT Agri","version":"1.0","type":"link"}