{"product_id":"piston-kit-kawasaki-klf-kef-kvf-300-os-1-00","title":"OS 1.00 Piston Kit for Kawasaki KLF 300 KEF 300 KVF 300 OEM Replacement Fits KLF 300 KEF 300 KVF 300 Quad","description":"\u003cdiv\u003e\n\u003cp\u003eOS 1.00 Oversize Piston Kit for the 300cc KLF 300, KEF 300, and KVF 300 engine family delivers a precise top-end rebuild for aging, compression‑strained powerplants. This aftermarket replacement restores lost displacement and power, bringing back peak compression and efficient combustion for improved trail and work performance. Designed as a straightforward OEM reference replacement with a +1.00 mm oversize piston, it’s a smart choice for a dependable rebuild and long‑term reliability in the 300cc class.\u003c\/p\u003e\n\u003cp\u003eBuilt to tackle common wear in high‑hour engines, this OS 1.00 kit targets worn piston lands, ring seating issues, and general loss of power from long service life. Its oversize upgrade provides a reliable path to reclaim factory‑level torque and throttle response without the premium price of OEM parts. For trail riders and farm use, this kit offers a durable solution that supports consistent cooling, better seal longevity, and dependable top-end performance under 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\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKLF 300 Bayou (KLF300B)\u003c\/td\u003e\n\u003ctd\u003e1989–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKLF 300 Bayou 4x4 (KLF300C)\u003c\/td\u003e\n\u003ctd\u003e1989–2005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKEF 300 Lakota (KEF300A)\u003c\/td\u003e\n\u003ctd\u003e1995–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKEF 300 Lakota Sport\u003c\/td\u003e\n\u003ctd\u003e2001–2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKawasaki\u003c\/td\u003e\n\u003ctd\u003eKVF 300 Prairie (KVF300B)\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\u003e13001-1178\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit (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\u003eKLF 300, KEF 300, KVF 300 engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy piston (piston body primarily aluminum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003eOversize OS +1.00 mm over stock (final bore ~77.0 mm depending on model)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Crown Style\u003c\/td\u003e\n\u003ctd\u003eStandard dome\/shape for 300cc lifestyle engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Kit Content (typical)\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin, circlips\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 style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 18.7571%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 22.2176%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 58.3032%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 18.7571%;\"\u003e13001-1178\u003c\/td\u003e\n\u003ctd style=\"width: 22.2176%;\"\u003eKawasaki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 58.3032%;\"\u003eOriginal equipment piston kit reference for KLF\/KEF\/KVF 300 engines; OS 1.00 oversize option aligns with this reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 18.7571%;\"\u003e13001-1430\u003c\/td\u003e\n\u003ctd style=\"width: 22.2176%;\"\u003eKawasaki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 58.3032%;\"\u003eStandard bore piston kit (76 mm) cross-reference for 300cc models; useful benchmark when sizing or mixing components.\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 core components needed for a top-end refresh on 300cc KLF\/KEF\/KVF engines:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003ePiston\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eRings\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePiston Pin\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eCirclips\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Gaskets and related top-end hardware are not included and may be sold separately as part of a complete rebuild kit.\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 KLF 300 \/ KEF 300 \/ KVF 300 families for a straightforward top‑end refresh.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross‑Reference:\u003c\/b\u003e Uses the OEM reference 13001-1178 to ensure reliable interchangeability with service parts catalogs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Aluminum alloy piston designed for durable, consistent performance under trail or workday stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores lost compression and power after high‑hour engine service without the cost of full OEM pistons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBroad Model Coverage:\u003c\/b\u003e Covers Bayou\/Lakota (KLF\/KEF) and Prairie (KVF) families, delivering a practical solution across a wide 300cc platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReliability for Work and Play:\u003c\/b\u003e Built for rugged use on trails and farms, where long‑term endurance matters as much as peak horsepower.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify bore size and piston oversize specification before installation; OS 1.00 is a precision increase over stock and requires proper seating and clearance checks.\u003c\/li\u003e\n\u003cli\u003eFollow standard top‑end rebuild procedures: clean cylinder, inspect cylinder walls for scoring, and verify ring end gaps per manufacturer recommendations.\u003c\/li\u003e\n\u003cli\u003eInstall the wrist pin and circlips with correct orientation; ensure smooth rotation without binding.\u003c\/li\u003e\n\u003cli\u003eUse a light coat of appropriate assembly lubricant on the piston skirts and wrist pin to reduce initial wear on first startup.\u003c\/li\u003e\n\u003cli\u003ePair the piston kit with a compatible gasket kit if you’re performing a full top‑end refresh; gasket components are not included in this kit.\u003c\/li\u003e\n\u003cli\u003eCarefully torque any related fasteners to the engine’s service specifications to avoid distortion or leaks during the first heat cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston in these 300cc engines invites compression loss, reduced power output, and higher risk of seizing under load. The OS 1.00 piston kit restores the intended compression and thrust characteristics, delivering reliable power during demanding work and keeping the engine’s long‑term reliability intact. Upgrading now helps prevent further bore wear and top‑end damage, ensuring the machine remains dependable for trail riding and farm duties alike.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319260422518,"sku":"190.20000-4","price":78.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_222512434.png?v=1774886192","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-kawasaki-klf-kef-kvf-300-os-1-00","provider":"DGT Agri","version":"1.0","type":"link"}