{"product_id":"piston-kit-kawasaki-klf-250-bayou-os-0-25","title":"OS 0.25 Piston Kit for Kawasaki KLF 250 Bayou 2003-2011 OEM Replacement Quality Premium","description":"\u003cdiv\u003e\n\u003cp\u003eOS 0.25 Piston Kit for Kawasaki KLF250 Bayou (2003–2011) is a complete aftermarket replacement piston assembly designed to restore compression and deliver smooth, reliable power after a rebuild. Specifically engineered to fit Kawasaki KLF250 Bayou models from 2003 through 2011, this oversize piston kit helps reclaim lost displacement while maintaining proper piston-to-cylinder clearance. The OS 0.25 option targets precise bore restoration for longevity and dependable performance in rugged off-road and farm use.\u003c\/p\u003e\n\u003cp\u003eOff-road and work use subjects the Bayou’s top end to heat and wear, leading to compression loss and lag in throttle response. This OS 0.25 piston kit provides a precise oversize to restore sealing and power, while delivering durable performance designed for trail runs and daily chores on the farm. It’s a practical upgrade when rebuilding the engine to bring the machine back to factory-like responsiveness.\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\u003eKLF250 Bayou\u003c\/td\u003e\n\u003ctd\u003e2003–2011\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eSource-driven fitment details confirm the piston kit marries directly with the Kawasaki KLF250 Bayou platform from 2003 through 2011.\u003c\/p\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\u003eNA-20003, NA-20003-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit OS 0.25\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 KLF250 Bayou (2003–2011)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-quality alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRings Included\u003c\/td\u003e\n\u003ctd\u003eYes (rings included with the kit; aftermarket rings may not be compatible with OEM piston rings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003eOS 0.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eNotes from documented NAMURA piston offerings confirm the NA-20003 family covers standard and oversize variants for the same Bayou era, with included rings, pin, and circlips.\u003c\/p\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: 18.5921%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 15.8187%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 64.8672%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 18.5921%;\"\u003eNA-20003\u003c\/td\u003e\n\u003ctd style=\"width: 15.8187%;\"\u003eNamura \/ Piston Kit\u003c\/td\u003e\n\u003ctd style=\"width: 64.8672%;\"\u003eStandard-size piston kit for Kawasaki KLF250 Bayou (2003–2011). Direct replacement; includes piston, rings, pin, and circlips.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 18.5921%;\"\u003eNA-20003-2\u003c\/td\u003e\n\u003ctd style=\"width: 15.8187%;\"\u003eNamura \/ Piston Kit\u003c\/td\u003e\n\u003ctd style=\"width: 64.8672%;\"\u003e+0.50 mm oversize piston kit for Kawasaki KLF250 Bayou (2003–2011). Direct replacement; includes piston, rings, pin, and circlips.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eCross-reference notes reflect typical NAMURA replacements used for the KLF250 Bayou across the 2003–2011 window, aligning with the NA-20003 family and its oversize variant.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eThis kit includes:\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\u003eWrist 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\u003ci\u003eNOTE: Rings included are aftermarket and not compatible with OEM piston rings.\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003eReferences indicate NAMURA-style piston assemblies for the KLF250 Bayou commonly ship with piston, rings, pin, and circlips, ready for top-end installation.\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 designed to fit Kawasaki KLF250 Bayou models from 2003–2011, facilitating straightforward installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference\u003c\/b\u003e — Aligns with OEM references NA-20003 and NA-20003-2 for reliable cross-compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials\u003c\/b\u003e — Constructed from a high-quality alloy designed for durability under heat and friction (coatings and processing details vary by variant).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration\u003c\/b\u003e — Restores compression and throttle responsiveness after a rebuild, helping reclaim original power characteristics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Top-End Repair\u003c\/b\u003e — A fraction of OEM top-end replacement costs with a complete top-end rebuild package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInstallation-Ready Kit\u003c\/b\u003e — Includes piston, rings, pin, and circlips to speed up the rebuild process.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCross-Reference and material-quality notes support reliable compatibility and top-end performance restoration for the Bayou platform.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the cylinder bore for scoring or taper; if wear is excessive, hone or re-bore per service specs before installing the piston kit.\u003c\/li\u003e\n\u003cli\u003eCheck piston-to-bore clearance and ring end gaps; follow the manufacturer’s recommended clearances for the oversize you’re installing.\u003c\/li\u003e\n\u003cli\u003eWhen installing rings, stagger end gaps and orient correctly; lubricate rings with assembly lube and avoid over-lubricating the skirt area.\u003c\/li\u003e\n\u003cli\u003eInstall the wrist pin and secure circlips fully; replace any damaged clips and verify they seat in the groove.\u003c\/li\u003e\n\u003cli\u003eUse fresh gaskets or top-end seals as required; ensure oil passages are clear and free of debris during reassembly.\u003c\/li\u003e\n\u003cli\u003ePerform a careful break-in procedure after installation to seat rings and establish proper seal and combustion stability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese practical steps align with standard top-end rebuild practices for late-model Bayou engines and NAS\/NAMURA-style piston kits.\u003c\/p\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston or worn ring package in a KLF250 Bayou can lead to compression loss, reduced power, and uneven engine performance, especially under load on trails or farm work. Replacing with this OS 0.25 piston kit restores sealing, throttle response, and overall reliability, helping the engine perform consistently in demanding conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319257899382,"sku":"190.04122","price":69.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-26_000619722.png?v=1774886126","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-kawasaki-klf-250-bayou-os-0-25","provider":"DGT Agri","version":"1.0","type":"link"}