{"product_id":"suzuki-ltf-400-piston-upgrade-eiger-king-quad-os-0-25-2002-2020","title":"Suzuki LTF 400 Piston Upgrade For Eiger 2003 2007 And KingQuad 2008 2020 OS 0.25","description":"\u003cdiv\u003e\n\u003cp\u003eOS 0.25 Piston Kit for Suzuki LTF 400 Eiger and King Quad engines delivers a precise top-end rebuild that restores compression, improves burn efficiency, and returns strong, consistent power for trail rides or farm work. Specifically designed to fit the LTF 400 family from 2003 through 2007 on the Eiger and from 2008 through 2020 on the King Quad, this aftermarket piston kit helps you reclaim factory-like performance without the OEM price tag. When you’re chasing crisper throttle response and steady power delivery, this OS 0.25 kit is a dependable upgrade option for your Suzuki quad.\u003c\/p\u003e\n\u003cp\u003eBuilt to address the common wear points of a worn LTF 400 top-end—compression loss, ring seating irregularities, and bore wear—this OS 0.25 piston kit provides a reliable path to renewed power and smoother operation in rugged terrain. It’s engineered for straightforward installation and dependable durability, making it a sensible choice for riders who rely on their Eiger or King Quad for weekend trails or demanding farm tasks.\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-A400 \/ LT-F400)\u003c\/td\u003e\n\u003ctd\u003e2003–2007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eLTF 400 King Quad (LT-F400F)\u003c\/td\u003e\n\u003ctd\u003e2008–2020\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\u003e12111-38F21-0F0; 12140-38F10; 12151-24A00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Kit (Oversize 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\u003eSuzuki LTF 400 Eiger (2003–2007) and LTF 400 King Quad (2008–2020)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNot specified\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\u003ctr\u003e\n\u003ctd\u003eNotes\u003c\/td\u003e\n\u003ctd\u003eTop-end rebuild component designed to restore compression and power\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\u003e12111-38F21-0F0\u003c\/td\u003e\n\u003ctd\u003eOEM Suzuki Piston\u003c\/td\u003e\n\u003ctd\u003eOS 0.25 piston included in kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12140-38F10\u003c\/td\u003e\n\u003ctd\u003eOEM Suzuki Ring Set\u003c\/td\u003e\n\u003ctd\u003eRing Set STD (cross-reference for rings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12151-24A00\u003c\/td\u003e\n\u003ctd\u003eOEM Suzuki Piston Pin\u003c\/td\u003e\n\u003ctd\u003ePiston pin included in kit\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 0.25 piston kit comes with the essential components for a top-end refresh.\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\u003cem\u003eGasket kit, seals, and cylinder head gaskets are not included; refer to your service manual for the appropriate gasket kit.\u003c\/em\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 to restore proper bore clearance on the LTF 400 Eiger and King Quad top-end.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference Ready:\u003c\/b\u003e Uses established Suzuki OEM references to ensure correct matching parts when coordinating with other components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOS 0.25 Oversize for Bore Restoration:\u003c\/b\u003e Restores compression and sealing by reclaiming lost bore capacity without oversize risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTop-End Rebuild Ready:\u003c\/b\u003e Designed for straightforward installation during routine maintenance or rebuilds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEngineered for Reliable Power:\u003c\/b\u003e Aims to restore smooth power delivery and dependable throttle response in rugged conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eValue-Driven Aftermarket:\u003c\/b\u003e Delivers factory-like performance at a competitive price point compared to OEM alternatives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the bore for scoring and ridge height before installation; micrometer measurements may be required to confirm acceptable wear.\u003c\/li\u003e\n\u003cli\u003eVerify piston orientation; align the arrow marking toward the exhaust side during installation.\u003c\/li\u003e\n\u003cli\u003eLubricate the piston, rings, and pin with assembly lube or engine oil before assembly to prevent dry starts.\u003c\/li\u003e\n\u003cli\u003eInstall the piston rings with correct gap orientation and ensure proper seating in the ring grooves to avoid pinch or binding.\u003c\/li\u003e\n\u003cli\u003eInstall the piston pin with the correct locking hardware (circlips) and confirm they are fully seated before reassembly.\u003c\/li\u003e\n\u003cli\u003eFollow the service manual torque sequence and clearances for the LTF 400 top-end; use OEM-approved gaskets and sealants where required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston in the LTF 400 can lead to compression loss, reduced power, and uneven combustion, which in turn degrades throttle response and fuel efficiency. This OS 0.25 piston kit restores compression and seals, delivering dependable power you can trust for trails or farm work.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319260881270,"sku":"190.30010-1","price":98.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_215640014.png?v=1772056607","url":"https:\/\/dgtagri.co.uk\/products\/suzuki-ltf-400-piston-upgrade-eiger-king-quad-os-0-25-2002-2020","provider":"DGT Agri","version":"1.0","type":"link"}