{"product_id":"piston-ring-kit-yamaha-yfm-450-kodiak-yxr-450-os-1-00-2003-2014","title":"Piston Ring Kit OS 1.00 For Yamaha YFM 450 Kodiak YXR 450 Fits YFM450FA 2003 2014","description":"\u003cdiv\u003e\n\u003cp\u003eRestore peak compression in a 450cc ATV engine by installing the OS 1.00 piston ring kit designed for the YFM450 family. This oversize 1.00 mm kit clamps down in the piston grooves to seal provenly, reduce oil blow-by, and deliver consistent power across trail work or farm duty. Engineered to fit multiple high-mileage models from the early 2000s through the mid-2010s, it’s the practical, cost-effective route to refresh compression without replacing the entire piston assembly.\u003c\/p\u003e\n\u003cp\u003eThe OS 1.00 kit tackles common wear like ring-land damage and oil leakage that creep into aging engines. By restoring proper ring seating and sealing, it supports reliable cold starts, steady throttle response, and predictable power delivery when you’re pulling stumps in the field or pushing through rough single-track. Choose this aftermarket replacement for a factory-like restoration at a fraction of the OEM price, with a focus on durability and precise fit.\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\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYFM450FA\u003c\/td\u003e\n\u003ctd\u003e2003–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYFM450FG\u003c\/td\u003e\n\u003ctd\u003e2007–2014\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYFM450FX\u003c\/td\u003e\n\u003ctd\u003e2006–2010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYXR450F\u003c\/td\u003e\n\u003ctd\u003e2006–2009\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\u003e5ND-11607-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePiston Ring Kit (Oversize 1.00 mm)\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\u003eYamaha YFM450FA\/FG\/FX, YXR450F (2003–2014)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversize\u003c\/td\u003e\n\u003ctd\u003e1.00 mm OS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003eTop compression ring; Second compression ring; Oil control ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNot specified by manufacturer\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\u003e5ND-11607-00-00\u003c\/td\u003e\n\u003ctd\u003eYamaha OEM\u003c\/td\u003e\n\u003ctd\u003eOS 1.00 Piston Ring Set for YFM450 family; aftermarket replacement available under Aftermarket Replacement branding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNA-40011-4\u003c\/td\u003e\n\u003ctd\u003eNamura\u003c\/td\u003e\n\u003ctd\u003eOS +1.00 piston kit alternative for YFM450FGP\/ Rhino 450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eW-4939M08550\u003c\/td\u003e\n\u003ctd\u003eWiseco\u003c\/td\u003e\n\u003ctd\u003eOS 1.00 piston kit alternative for Yamaha YFM450 models\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 kit includes the essential rings to restore compression on the affected models:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003eTop compression ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eSecond compression ring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOil control ring\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: This kit does not include the piston, wrist pin, clip(s), or circlips.\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 YFM450FA\/FG\/FX and YXR450F ring grooves and piston sizes for reliable install and sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM Cross-Reference:\u003c\/b\u003e Uses the Yamaha 5ND-11607-00-00 specification as the anchor reference, ensuring correct aftermarket substitution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePremium Materials \u0026amp; Precision:\u003c\/b\u003e Engineered to restore sealing surfaces and control oil blow-by, helping maintain steady compression under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance Restoration:\u003c\/b\u003e Reinstates reliable throttle response and cold-start performance by restoring ring seal in high-mileage engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCost-Effective Alternative:\u003c\/b\u003e Delivers OEM-like performance at a fraction of the price, reducing overall rebuild costs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrail- and Farm-Grade Durability:\u003c\/b\u003e Designed to endure the grime, dust, and load of off-road and field-use environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThoroughly clean ring lands and cylinder grooves before re-assembly to ensure proper seating and sealing.\u003c\/li\u003e\n\u003cli\u003eUse a proper ring expander and a ring compressor to avoid scratching or bending rings during installation.\u003c\/li\u003e\n\u003cli\u003eCheck the end-gap of each ring with a feeler gauge and ensure it matches OEM or the specified aftermarket tolerances.\u003c\/li\u003e\n\u003cli\u003eLubricate the rings lightly with clean engine oil before installation to reduce initial wear during startup.\u003c\/li\u003e\n\u003cli\u003eInstall the top compression ring with the marked side facing up and align ring gaps to avoid alignment with the piston pin or exhaust port gaps.\u003c\/li\u003e\n\u003cli\u003eCarefully insert the piston into the cylinder, keeping ring grooves aligned and avoiding ring twist or pinching.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Upgrade?\u003c\/h3\u003e\n\u003cp\u003eRunning a worn piston ring set can lead to compression loss, increased oil consumption, and reduced power. Upgrading to the OS 1.00 piston ring kit restores proper sealing and compression, delivering reliable power and cleaner operation across demanding trail and farm tasks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319264813430,"sku":"192.04895","price":22.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/image_2026-02-25_144614132.png?v=1774886126","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-yamaha-yfm-450-kodiak-yxr-450-os-1-00-2003-2014","provider":"DGT Agri","version":"1.0","type":"link"}