{"product_id":"piston-ring-kit-honda-trx-300-os-1-00-1988-2000","title":"Honda TRX 300 Piston Ring Kit OS 1.00 1988-2000 Replacement Sealing and Compression","description":"\u003cdiv\u003e\n\u003cp\u003eThis OS 1.00 Piston Ring Kit is a precision three-ring set designed to restore compression and sealing in the TRX300 FourTrax family (1988-2000) and its 4x4 variant. It’s engineered as a direct, no-mods replacement for the original rings, delivering reliable power, smoother operation, and less oil blow-by on rugged trails and demanding farm work. When rings wear or seating becomes compromised, this kit helps recover throttle response, reduce oil consumption, and reestablish peak top-end performance.\u003c\/p\u003e\n\u003cp\u003eBuilt as a durable aftermarket alternative, this ring kit targets the common wear points in the TRX300 top end. It provides a dependable rebuild path when aging engines show compression fade, increased oil leakage into the combustion chamber, or power loss under load. With a focus on long-term sealing and consistent compression, it’s a practical choice for riders and land managers who rely on steady performance in tough conditions.\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\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003eTRX300 FourTrax\u003c\/td\u003e\n\u003ctd\u003e1988-2000 — Piston Ring Kit OS 1.00 for standard\/bore wear restoration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003eTRX300FW FourTrax 4x4\u003c\/td\u003e\n\u003ctd\u003e1988-2000 — Includes OS 1.00 ring set matching the 4x4 variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003eTRX300 (All variants)\u003c\/td\u003e\n\u003ctd\u003e1988-2000 — Direct replacement rings for worn engines\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-HC4-306\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Set\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\u003eTRX 300 (1988-2000) — OS 1.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eChrome-plated steel piston rings (3-ring set)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Compatibility\u003c\/td\u003e\n\u003ctd\u003eStandard bore 74.00 mm; Oversize option +1.00 mm (75.00 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Configuration\u003c\/td\u003e\n\u003ctd\u003e3 rings: Top Compression Ring, Second Compression Ring, Oil Control Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e3 rings (top, second, oil control)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-Reference (OEM)\u003c\/td\u003e\n\u003ctd\u003eDirect replacement for Honda 13051-HC4-306\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-HC4-306\u003c\/td\u003e\n\u003ctd\u003eOEM Honda\u003c\/td\u003e\n\u003ctd\u003eRING SET, PISTON (1.00) — direct OEM replacement for TRX300 1988-2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13041-HC4-306\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003eRING SET, PISTON (0.75 oversize) — alternative cross-reference when bore is bored +0.75 mm\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 kit includes the essential rings required to restore sealing and compression on the TRX300 top end. \u003cbr\u003e\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\u003cem\u003e*Wrist pin, circlips, and top-end gasket kit are not included in this piston ring set.*\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 matched to the TRX300 1988-2000 engine geometry for straightforward installation and seating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Aligns with Honda 13051-HC4-306 and 13041-HC4-306, ensuring serviceable replacement options and known fitment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Chrome-plated steel rings engineered to resist heat and wear in the TRX300 top end for durability in rugged use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e3-Ring Configuration:\u003c\/b\u003e Top and second compression rings plus an oil control ring deliver robust sealing and oil management across the bore.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Reestablishes compression, reduces oil consumption, and restores throttle response after ring wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Replacement:\u003c\/b\u003e A reliable aftermarket option that maintains OEM-fit performance at a more approachable price.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCarefully inspect the cylinder bore for ridge wear and measure bore diameter to confirm standard 74.00 mm or oversize bore as applicable before assembly.\u003c\/li\u003e\n\u003cli\u003eClean grooves thoroughly and verify there is no scoring that could mis-seat the rings; remove any carbon buildup from the piston lands.\u003c\/li\u003e\n\u003cli\u003eOrient the rings correctly: install the Top Compression Ring, followed by the Second Compression Ring, then the Oil Control Ring; stagger the end gaps to avoid continuous gaps in a single line.\u003c\/li\u003e\n\u003cli\u003eLubricate all rings and the piston skirts with clean engine oil before installation to prevent dry starts and scoring.\u003c\/li\u003e\n\u003cli\u003eUse a proper ring compressor when sliding the rings onto the piston to prevent ring deformation; ensure the rings are fully seated in their grooves.\u003c\/li\u003e\n\u003cli\u003eAfter reassembly, perform a careful break-in period with gradually increasing throttle to allow rings to seat and seat grooves to wear evenly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston ring set typically leads to reduced compression, increased oil consumption, and diminished throttle response. This replacement restores proper ring seating and sealing, reducing blow-by and bringing back reliable power for both trail riding and farm work.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319262191990,"sku":"192.04535","price":16.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_bb02a4ff-6cf1-4ea8-b560-d90f38883961.png?v=1774886131","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-honda-trx-300-os-1-00-1988-2000","provider":"DGT Agri","version":"1.0","type":"link"}