{"product_id":"suzuki-ltf-400-oversize-piston-eiger-king-quad-os-1-00-2002-2020","title":"Suzuki LTF 400 Oversize Piston OS 1.00 Piston Kit For Eiger 2003-2007 And KingQuad 2008-2020","description":"\u003cdiv\u003e\n\u003cp\u003eUpgrade and reclaim lost power with this oversize OS 1.00 piston kit, designed specifically for the LTF 400 family in Eiger and KingQuad platforms. The +1.00 bore increase restores compression and displacement, delivering crisper throttle response and stronger mid-range punch after years of wear or bore repair. This aftermarket replacement is engineered to meet the engine’s tolerances and support reliable operation across the Eiger and KingQuad 400cc engines. Suitable for use after honing or bore repair to achieve the OS +1.00 specification, it ensures proper ring seal and consistent performance on both Eiger and KingQuad models.\u003c\/p\u003e\n\u003cp\u003eBeyond simply replacing a worn piston, this OS 1.00 kit targets the core wear points that sap power on rugged trails and tough farm work. Expect improved compression, reduced oil blow-by, and steadier heat management thanks to a hypereutectic aluminum piston with MOS2-coated skirts. The kit is a complete top-end rebuild solution, designed for straightforward installation and long-term reliability in demanding 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\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eLTF 400 Eiger (LT-F400\/LT-F)\u003c\/td\u003e\n\u003ctd\u003e2003–2007; OS +1.00 oversize bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eLTA 400 Eiger (LT-A400)\u003c\/td\u003e\n\u003ctd\u003e2002–2007; OS +1.00 oversize bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eLT-F 400 Eiger (LT-F400)\u003c\/td\u003e\n\u003ctd\u003e2002–2007; OS +1.00 oversize bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eLT-A400F KingQuad\u003c\/td\u003e\n\u003ctd\u003e2008–2019; OS +1.00 oversize bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eLT-F400F KingQuad\u003c\/td\u003e\n\u003ctd\u003e2008–2019; OS +1.00 oversize bore\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\u003e11210-27H00-0F0; 11241-38F00; 11141-38F00; 12140-38F10; 12100-38F21-050; 3403-238; 3402-578\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit (Oversize 1.00, 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\u003eAir- or oil-cooled 376cc Suzuki LTF\/LT-F 400 engines (Eiger\/KingQuad family; LT-A400\/LT-F400) requiring +1.00 oversize bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHypereutectic aluminum alloy; MOS2-coated skirts for reduced friction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eMOS2-coated skirts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize \/ Bore Increase\u003c\/td\u003e\n\u003ctd\u003eOS +1.00 mm (bore increased by 1.00 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Components\u003c\/td\u003e\n\u003ctd\u003ePiston, rings (OEM-quality), 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: 24.8827%;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"width: 20.6047%;\"\u003eBrand \/ Type\u003c\/th\u003e\n\u003cth style=\"width: 53.7906%;\"\u003eCross-Reference Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e11210-27H00-0F0\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eDirect cross-reference to OS +1.00 piston kit; verify compatibility with service manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e11241-38F00\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eCross-reference for top-end rebuild kits within the LT-F\/LT-A 400 family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e11141-38F00\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eCross-reference for Eiger\/KingQuad 400 applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e12140-38F10\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eCross-reference for piston ring sets in OS 1.00 kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e12100-38F21-050\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eCross-reference for piston-related components in top-end kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e3403-238\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eCross-reference for cylinder\/bore-related components in compatible kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003e3402-578\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eSuzuki OEM\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eCross-reference for associated top-end hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.8827%;\"\u003eNA-30010-4\u003c\/td\u003e\n\u003ctd style=\"width: 20.6047%;\"\u003eNamura (Aftermarket Replacement)\u003c\/td\u003e\n\u003ctd style=\"width: 53.7906%;\"\u003eOS +1.00 piston kit for Suzuki LT-A400F KingQuad \/ LT-F400 Eiger; direct aftermarket alternative\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 OS +1.00 piston kit ships with everything you need to complete the top-end rebuild.\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\u003cem\u003eGaskets and related seals are not included; a separate gasket set is typically required for installation and should be selected based on your engine configuration.\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 for OS +1.00 bore applications on the LTF\/LT-F 400 family, simplifying top-end rebuilds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Backed by established Suzuki cross-references to ensure correct application and dealer compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials:\u003c\/b\u003e Hypereutectic aluminum piston with MOS2-coated skirts for reduced friction and longer life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Restores displacement and compression to reclaim lost power and throttle feel on trails and farms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReliability in Tough Conditions:\u003c\/b\u003e Engineered to withstand heat and wear from off-road duty in Eiger and KingQuad platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Alternative:\u003c\/b\u003e A practical, affordable option that maintains factory-like performance without OEM pricing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify bore condition and confirm the required oversize (+1.00 mm) with your rebuild spec before ordering.\u003c\/li\u003e\n\u003cli\u003eMeasure ring-end gaps and ensure they are within manufacturer tolerances; improper gaps can cause compression loss or scuffing.\u003c\/li\u003e\n\u003cli\u003eOrient the piston correctly according to any arrow markings and ensure the rings are installed in the correct locations (especially top and second rings).\u003c\/li\u003e\n\u003cli\u003eLubricate the piston, rings, and wrist pin with assembly lube before assembly to prevent dry starts.\u003c\/li\u003e\n\u003cli\u003eInstall the circlips securely with the appropriate pliers; check for complete retention before reinstalling the cylinder head.\u003c\/li\u003e\n\u003cli\u003eFollow a proper break-in procedure after assembly to promote even ring seating and piston wear patterns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn or under-spec piston in an OS +1.00 bore setup risks continued compression loss, accelerated wear, and potential heat-related damage under heavy use. This replacement restores displacement and compression, delivering dependable power and throttle response once again for reliable trail and farm performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"DGT Agri","offers":[{"title":"Default Title","offer_id":57319187415414,"sku":"190.30010-4","price":98.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-26_000845964.png?v=1772064534","url":"https:\/\/dgtagri.co.uk\/products\/suzuki-ltf-400-oversize-piston-eiger-king-quad-os-1-00-2002-2020","provider":"DGT Agri","version":"1.0","type":"link"}