{"product_id":"piston-ring-kit-honda-trx-400-os-1-00-1995-2003","title":"Piston Ring Kit For Honda TRX 400FW Foreman 1995 To 2003 Oversize 1mm Rebuild Kit","description":"\u003cdiv\u003eThis piston ring kit is a precision top-end rebuild solution designed for a single-cylinder four-stroke engine found in mid-1990s to early-2000s utility ATVs. It covers model years 1995 through 2003 with an oversize +1.00 mm bore on an 87 mm cylinder, delivering restored compression and improved oil control. Built to withstand rugged trail and farm work, this kit helps restore peak throttle response, power, and reliable cooling during demanding use. By replacing worn piston rings, this aftermarket kit directly tackles common wear issues that degrade performance over time—loss of compression, higher oil consumption, and smoky exhaust. It offers a cost-effective, reliable option for riders and operators who demand durable top-end performance in tough environments, without the OEM-part price tag. It's a dependable choice for trail rides or field maintenance where consistent seal and oil management matter most.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e\u003c\/h3\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 400FW Foreman (TRX400FW, 4x4)\u003c\/td\u003e\n\u003ctd\u003e1995–2003; 87 mm bore; oversize +1.00 mm\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\u003e13051-HM7-003, 13051-HM7-004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring 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 TRX400FW Foreman (1995–2003)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003e87 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003e+1.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Count \/ Per Cylinder\u003c\/td\u003e\n\u003ctd\u003eTop Compression Ring, Second Compression Ring, Oil Ring (1-cylinder engine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Arrangement\u003c\/td\u003e\n\u003ctd\u003eSingle-Cylinder Top End\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackaging Quantity\u003c\/td\u003e\n\u003ctd\u003e1 kit\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\u003e13051-HM7-003\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement \/ OEM Reference\u003c\/td\u003e\n\u003ctd\u003eDirect replacement for TRX400FW 1995–2003; aligns with OEM family references\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13051-HM7-004\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement \/ OEM Reference\u003c\/td\u003e\n\u003ctd\u003eAlternate OEM reference used in some listings; same 87 mm oversize lineage for TRX400FW 1995–2003\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\u003eThe box includes the essential piston rings for the TRX400FW top-end rebuild.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003ePiston Ring – Top Compression Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePiston Ring – Second Compression Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOil Ring\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: related gaskets, seals, or the piston itself are not included.\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 Precisely engineered to replace OEM 13051-HM7-003 \/ 13051-HM7-004 on the TRX400FW (1995–2003) without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Aligns with widely used OEM references to ensure reliable aftermarket compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials \u0026amp; Construction:\u003c\/b\u003e Built to endure heat, friction, and high RPMs of a demanding top-end rebuild.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores compression and oil separation to bring back power, throttle response, and smoother operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Maintenance:\u003c\/b\u003e A durable aftermarket alternative that saves money while maintaining engine integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrail- and Farm-Ready Durability:\u003c\/b\u003e Designed to withstand rugged, real-world conditions where reliability matters most.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify bore size is 87 mm and oversize +1.00 mm matches your cylinder.\u003c\/li\u003e\n\u003cli\u003eClean the cylinder, grooves, and surrounding area thoroughly; remove any debris before assembly.\u003c\/li\u003e\n\u003cli\u003eCheck ring end gaps per service manual or OEM guidance; ensure gaps are within spec.\u003c\/li\u003e\n\u003cli\u003eLubricate rings with clean engine oil before installation to prevent dry friction on startup.\u003c\/li\u003e\n\u003cli\u003eInstall rings in the correct order and orientation: top compression ring, second compression ring, then oil ring.\u003c\/li\u003e\n\u003cli\u003eA proper break-in procedure after engine assembly is recommended to maximize seal and longevity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston ring kit allows compression to fall and oil control to degrade, leading to power loss, higher oil consumption, and smoky exhaust. This replacement restores compression and oil separation, delivering reliable power and smooth operation under demanding trail or farm conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319261864310,"sku":"192.04505","price":21.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_f25aa081-33cb-418f-a594-bceff92ed544.png?v=1774886192","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-400-os-1-00-1995-2003","provider":"DGT Agri","version":"1.0","type":"link"}