{"product_id":"piston-ring-kit-honda-trx-400-os-0-50-1995-2003","title":"Piston Ring Kit For Honda TRX 400 Foreman TRX400FW 1995 2003 Oversize 0.50mm OS Replacement","description":"\u003cdiv\u003e\n\u003cp\u003eRestore engine compression and sealing with a +0.50 mm oversize piston ring kit designed for the TRX400FW Foreman models produced from 1995 through 2003. This single‑cylinder, four‑stroke kit targets worn rings that fade under high mileage, delivering a tighter seal and improved power on both trail rides and hard work days. It provides a practical rebuild option that restores factory-like performance without the cost of OEM parts.\u003c\/p\u003e\n\u003cp\u003eBuilt to endure the rigors of trail riding and farm duty, this oversize ring kit addresses common wear such as compression loss and increased oil consumption from worn rings. The precision fit and durable materials offer reliable sealing under load, helping you maintain dependable ignition, smoother idle, and consistent throttle response when the going gets rough.\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\u003eTRX400FW Foreman 4x4\u003c\/td\u003e\n\u003ctd\u003e1995-2003 (0.50 oversize ring kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX 400 Foreman (TRX400FW)\u003c\/td\u003e\n\u003ctd\u003e1995-2003 (0.50 oversize rings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eTRX-400 FW family (single‑cylinder engine)\u003c\/td\u003e\n\u003ctd\u003e1995-2003 (0.50 oversize ring kit)\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\u003e13031-HM7-003, 13031-HM7-004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Kit (0.50 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 TRX400FW Foreman (TRX 400) 1995-2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh‑grade steel alloy with ring face coatings for wear resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Count\u003c\/td\u003e\n\u003ctd\u003e1‑cylinder engine\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\u003eRings Included\u003c\/td\u003e\n\u003ctd\u003e2× Compression rings + 1× Oil‑control ring (3‑ring set per cylinder)\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\u003e13031-HM7-003\u003c\/td\u003e\n\u003ctd\u003eHonda OEM\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Set, 0.50 oversize; TRX400FW Foreman 1995-2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13031-HM7-004\u003c\/td\u003e\n\u003ctd\u003eHonda OEM\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Set, 0.50 oversize; TRX400FW Foreman 1995-2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13031HM7003\u003c\/td\u003e\n\u003ctd\u003eHonda OEM (market variation)\u003c\/td\u003e\n\u003ctd\u003e0.50 oversize ring set for TRX400FW Foreman (1995-2003) in some catalogs\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 kit includes the essential piston ring components sized for +0.50 mm TRX 400 engines.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCompression Rings\u003c\/b\u003e (2 pcs)\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOil‑Control Ring\u003c\/b\u003e (1 pc)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePiston Ring Set\u003c\/b\u003e (+0.50 mm Oversize) for one cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated parts not included: pistons, circlips, and gaskets.\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 TRX400FW Foreman bore and ring lands for a reliable, drop‑in seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross‑Reference:\u003c\/b\u003e stays aligned with Honda’s 13031‑HM7‑003 \/ 13031‑HM7‑004 standards while delivering aftermarket value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e high‑grade steel alloy with proven ring face coatings for wear resistance and sealing performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecise Oversize Fit:\u003c\/b\u003e +0.50 mm oversize rings restore proper compression and reduce blow‑by on worn units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e helps recover power, throttle response, and efficiency after engine wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost‑Effective Choice:\u003c\/b\u003e a practical alternative to OEM pricing without sacrificing reliability on trails or work tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlways ensure the engine is cold and disconnect the ignition before starting any top‑end work.\u003c\/li\u003e\n\u003cli\u003eInspect the cylinder bore for scoring or excessive wear; measure bore diameter to confirm compatibility with the +0.50 mm oversize rings.\u003c\/li\u003e\n\u003cli\u003eLubricate all rings and the piston with clean engine oil before installation to promote proper seating and sealing.\u003c\/li\u003e\n\u003cli\u003eInstall rings with correct orientation and stagger end gaps (typically 180 degrees apart) to minimize fuel‑air entrainment and blow‑by.\u003c\/li\u003e\n\u003cli\u003eUse a proper piston ring compressor to seat rings evenly into the bore; avoid twisting or deforming rings during installation.\u003c\/li\u003e\n\u003cli\u003eAfter assembly, verify clearances and perform a careful break‑in procedure to seat the rings effectively and prevent glazing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston ring set leads to compression loss, increased oil consumption, and degraded engine performance. This oversize replacement restores sealing integrity and compression pressure, helping the engine regain reliable power and efficiency for demanding trail or farm use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319261766006,"sku":"192.04503","price":17.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_38f8b816-f328-409f-8b08-c98dfa30719d.png?v=1774886193","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-400-os-0-50-1995-2003","provider":"DGT Agri","version":"1.0","type":"link"}