{"product_id":"piston-kit-kawasaki-klf-220-bayou-os-1-50-1988-2003","title":"Piston Kit OS 1.50 For Kawasaki KLF 220 Bayou 1988 2003 Direct OEM Replacement Quality","description":"\u003cdiv\u003e\n\u003cp\u003eRestore peak compression and power with the OS 1.50 piston kit designed for Kawasaki KLF220 Bayou engines spanning 1988 through 2003. The OS 1.50 oversize bore (67.50 mm) provides a precise match for rebuilt cylinders, delivering crisper throttle response and dependable performance whether you’re tearing through trails or putting in work on the land. Engineered to meet or exceed OEM standards, this aftermarket replacement brings renewed top-end performance and longer service life under demanding riding conditions.\u003c\/p\u003e\n\u003cp\u003eBeyond simple bore size, this OS oversize kit targets common top-end wear: piston skirt scuffing, ring-land wear, and compression loss that rob power. The forged aluminum piston delivers strength and thermal stability for tough terrain, while the complete kit options (notably the Wiseco PK1048) include all necessary components for a true rebuild, so you can trust long-lasting reliability on the trail or on the job site.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Vehicle Fitment\u003c\/h3\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 17.509%;\"\u003eManufacturer\u003c\/th\u003e\n\u003cth style=\"width: 28.5721%;\"\u003eModels \/ Series\u003c\/th\u003e\n\u003cth style=\"width: 53.1969%;\"\u003eYears \/ Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.509%;\"\u003eKawasaki\u003c\/td\u003e\n\u003ctd style=\"width: 28.5721%;\"\u003eKLF220 Bayou (KLF220A \/ KLF220B)\u003c\/td\u003e\n\u003ctd style=\"width: 53.1969%;\"\u003e1988–2003; top-end piston kit with OS oversize option (67.50 mm) or standard bore variants; suitable for full top-end rebuilds with pistons, rings, wrist pin, and clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.509%;\"\u003eKawasaki\u003c\/td\u003e\n\u003ctd style=\"width: 28.5721%;\"\u003eKLF220 Bayou (KLF220A)\u003c\/td\u003e\n\u003ctd style=\"width: 53.1969%;\"\u003e1988–2002; standard bore \/ oversize options available through aftermarket kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eSources: Wiseco PK1048 overview (67.50 mm oversize for KLF220 Bayou), Namura NA-20001 standard bore option, and general KLF220 Bayou fitment references.\u003c\/em\u003e\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\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit (Top End)\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 KLF220 Bayou, 1988–2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eForged aluminum piston (2618 alloy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Size \/ Bore Options\u003c\/td\u003e\n\u003ctd\u003eStandard: 66.97 mm (Namura NA-20001); Oversize: 67.50 mm (+0.50 mm) (Wiseco PK1048)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore \/ Stroke\u003c\/td\u003e\n\u003ctd\u003eBore 67.50 mm oversize; Stroke 61.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Ratio\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplacement\u003c\/td\u003e\n\u003ctd size=\"\" by=\"\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\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: 20.5776%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 35.7304%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 42.97%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5776%;\"\u003ePK1048\u003c\/td\u003e\n\u003ctd style=\"width: 35.7304%;\"\u003eWiseco Top End Kit\u003c\/td\u003e\n\u003ctd style=\"width: 42.97%;\"\u003e67.50 mm oversize (+0.50 mm); 9.3:1 compression; fits Kawasaki KLF220 Bayou (1988–2002\/2003); includes piston, rings, wrist pin, circlips, and top-end gasket kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5776%;\"\u003eNA-20001\u003c\/td\u003e\n\u003ctd style=\"width: 35.7304%;\"\u003eNamura Piston Kit\u003c\/td\u003e\n\u003ctd style=\"width: 42.97%;\"\u003eStandard bore 66.97 mm; fits Kawasaki KLF220 Bayou (1988–2002); piston only (varies by kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.5776%;\"\u003eKawasaki OEM kit components\u003c\/td\u003e\n\u003ctd style=\"width: 35.7304%;\"\u003eKawasaki OEM (cylinder\/piston\/rings\/gaskets)\u003c\/td\u003e\n\u003ctd style=\"width: 42.97%;\"\u003eRefer to OEM top-end rebuild references for KLF220 Bayou; typical OEM components include cylinder, piston, rings, wrist pin, circlips, and gasket set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eA short-top-end rebuild kit option includes the following components. \u003cb\u003ePiston Kit – Wiseco PK1048\u003c\/b\u003e includes: \u003cb\u003ePiston\u003c\/b\u003e, \u003cb\u003eRings\u003c\/b\u003e, \u003cb\u003eWrist Pin\u003c\/b\u003e, \u003cb\u003eCirclips\u003c\/b\u003e, and \u003cb\u003eTop-End Gasket Kit\u003c\/b\u003e. \u003cbr\u003e\u003cb\u003ePiston Kit – Namura NA-20001\u003c\/b\u003e includes: \u003cb\u003ePiston\u003c\/b\u003e (standard bore).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePiston\u003c\/b\u003e (67.50 mm oversize for PK1048)\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\u003cli\u003e\n\u003cb\u003eTop-End Gasket Kit\u003c\/b\u003e (Wiseco option)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Namura NA-20001 standard bore option typically includes the piston only; other top-end components may not be 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 engineered to match Kawasaki KLF220 Bayou engines from 1988–2003 for straightforward installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Cross-referenced with standard and oversize bore options (66.97 mm and 67.50 mm) to match your rebuild plan.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Forged aluminum piston (2618 alloy) delivers higher strength and better thermal stability under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Oversize 67.50 mm bore with 9.3:1 compression restores power and throttle response after wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile Bore Options:\u003c\/b\u003e Choose standard (Namura NA-20101) or oversize (Wiseco PK1048) to suit the cylinder you’ve prepared.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable Top-End Kit:\u003c\/b\u003e When paired with the PK1048, you get a complete top-end gasket kit and all required components for a reliable rebuild.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify bore size before purchase: standard bore (Namura NA-20001) vs oversize (+0.50 mm) bore (Wiseco PK1048) and ensure the cylinder is prepared accordingly (boring\/honing as required).\u003c\/li\u003e\n\u003cli\u003eClean the cylinder and hone or bore to the correct finish for proper ring seating; inspect the cylinder for wear or scoring before assembly.\u003c\/li\u003e\n\u003cli\u003eInstall piston rings with correct orientation and stagger end gaps to prevent gas blow-by; align gaps away from the intake and exhaust ports.\u003c\/li\u003e\n\u003cli\u003eLubricate the piston, rings, and wrist pin with assembly oil during install to protect the finish on first start.\u003c\/li\u003e\n\u003cli\u003eAttach wrist pin and secure with circlips fully seated; double-check for clearance around the wrist pin bore.\u003c\/li\u003e\n\u003cli\u003eInstall the full top-end gasket kit when using the Wiseco PK1048 kit; ensure mating surfaces are clean and free of oil or debris to seal properly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eWorn piston and top-end components degrade compression, throttle response, and overall power, increasing heat and wear on the cylinder. Upgrading to this OS oversize piston kit restores compression and reliability, delivering consistent performance in rugged trail and farm work while reducing the risk of top-end failures during demanding use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319260684662,"sku":"190.20001-6","price":87.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_221425238.png?v=1774886191","url":"https:\/\/dgtagri.co.uk\/products\/piston-kit-kawasaki-klf-220-bayou-os-1-50-1988-2003","provider":"DGT Agri","version":"1.0","type":"link"}