{"product_id":"kawasaki-300-os-rings-kit-kef-klf-kvf-300-os-1-00-1985-2004","title":"Kawasaki 300 OS Rings Kit OS 1.00 For KEF KLF KVF 300 Engines 1985 To 2004 2 Stroke Piston Ring Set","description":"\u003cdiv\u003eOS end-gap piston ring kit designed for the 300 OS engines across KEF, KLF, and KVF platforms from 1985 through 2004. This OS 1.00 end-gap kit restores compression and minimizes oil loss, delivering solid, reliable power for trail rides, ranch work, and demanding job-site use. It’s a cost-conscious aftermarket replacement that mirrors factory specifications to keep the engine performing like new. The kit targets common wear points in the 300 OS lineup—ring lands, blow-by, and oil control issues—so you can trust consistent sealing and predictable compression across your next ride or shift. With a three-ring design (two compression rings plus one oil ring) and a precise OS 1.00 end-gap, this kit is engineered to maintain seal geometry under the vibration and high-load conditions typical of rugged terrain. The rings use a standard piston ring alloy suitable for the harsh environment of 2- and 4-stroke highway, trail, and farm work, delivering durable performance and repeatable results. Built to Kawasaki specifications, this aftermarket set offers a reliable alternative when OEM pricing isn’t desirable, without sacrificing fit or function.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\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\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKLF Bayou 300 (KLF300)\u003c\/td\u003e\n\u003ctd\u003e1986–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKEF Lakota 300 (KEF300) \/ Lakota Sport\u003c\/td\u003e\n\u003ctd\u003e1995–2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKVF Prairie 300 (KVF300)\u003c\/td\u003e\n\u003ctd\u003e1999–2002\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eBayou 300 variants (KLF300 family)\u003c\/td\u003e\n\u003ctd\u003e1989–2004 (and related variants into early 2000s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eLakota Sport \/ Lakota lineage\u003c\/td\u003e\n\u003ctd\u003e1995–2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKVF Prairie 300 variants\u003c\/td\u003e\n\u003ctd\u003e1999–2002\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\u003e13024-1080\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Kit (OS 1.00 end-gap)\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\u003eKawasaki 300 OS engines: KEF\/KLF\/KVF 300, 1985–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStandard piston ring alloy (high-grade steel\/cast-iron blend typical for OS ring sets)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Gap\u003c\/td\u003e\n\u003ctd\u003eOS 1.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Configuration\u003c\/td\u003e\n\u003ctd\u003e2 x compression rings + 1 x oil ring (3-ring set)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Compatibility\u003c\/td\u003e\n\u003ctd\u003eApprox. 77.0 mm bore (OS 1.00 over standard 76.0 mm)\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\u003e13024-1080\u003c\/td\u003e\n\u003ctd\u003eKawasaki OEM\u003c\/td\u003e\n\u003ctd\u003eOriginal piston ring set with OS end-gap; direct-fit for KEF\/KLF\/KVF 300 engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13024-1080\u003c\/td\u003e\n\u003ctd\u003eAftermarket Replacement\u003c\/td\u003e\n\u003ctd\u003eDirect-fit OS 1.00 end-gap kit matching OEM specification\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\nIn the box you’ll find the essential rings matched to the KEF\/KLF\/KVF 300 OS bore:\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003eTop compression ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eSecond compression ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOil control ring\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: This kit includes the rings only. Piston, wrist pin, circlips, and gaskets 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 sized OS 1.00 end-gap rings designed for KEF\/KLF\/KVF 300 models for reliable sealing and repeatable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference\u003c\/b\u003e—Matches the OEM 13024-1080 specifications to preserve factory-level compression and power characteristics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials\u003c\/b\u003e—Engineered with a high-grade piston ring alloy suited to rugged, vibration-heavy service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOS 1.00 End Gap\u003c\/b\u003e—Maintains correct seal geometry to minimize blow-by and oil burn, restoring original power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration\u003c\/b\u003e—Targeted fix for ring lands, oil scavenging, and compression loss common in aged 300 OS engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Alternative\u003c\/b\u003e—Delivering factory-like performance without OEM-part pricing, ideal for trails and farm work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMeasure bore and gap\u003c\/b\u003e—Confirm the actual bore is around 77.0 mm for OS 1.00 rings and verify end-gap with a feeler gauge before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClean bore surfaces\u003c\/b\u003e—Flush away all carbon and debris; a clean bore ensures consistent ring seating and seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLubricate rings lightly\u003c\/b\u003e—Apply clean engine oil to the ring faces and ends before installing to minimize initial wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlign gaps properly\u003c\/b\u003e—Stack ring gaps so they are offset from the piston pin and each other, typically by at least 0.5–1.0 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInstall in correct orientation\u003c\/b\u003e—Follow the piston’s ring-groove orientation and land marks to avoid misalignment during startup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCheck end-gap after seating\u003c\/b\u003e—Re-check end-gap once the rings are seated and before final torquing or assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\nRunning a worn piston ring set on a 300 OS engine invites compression loss, excessive blow-by, and elevated oil consumption, which dulls throttle response and reduces reliability on tough terrain or job sites. This OS 1.00 end-gap replacement restores sealing integrity and consistent compression, returning power, throttle feel, and oil control to near-original levels.\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319263469942,"sku":"192.04615","price":18.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_e9aca391-0b5f-4760-a580-e248e87cf4ab.png?v=1774886131","url":"https:\/\/dgtagri.co.uk\/products\/kawasaki-300-os-rings-kit-kef-klf-kvf-300-os-1-00-1985-2004","provider":"DGT Agri","version":"1.0","type":"link"}