{"product_id":"eibach-eib904-040-1-ems-fork-spring-kit-for-yamaha-yz250f-and-yz450f","title":"Eibach EIB904.040.1 EMS Fork Spring Kit for Yamaha YZ250F and YZ450F","description":"With a range of spring rate options available, you can fine-tune your suspension to deliver the perfect balance of comfort and performance. And, with a precise fit and easy installation, you'll be back on the road in no time, enjoying the benefits of your upgraded suspension.\n\u003cul\u003e\n  \u003cli\u003eEibach EMS Springs Available in a Full Range of Rates to Fine Tune Suspension to each Rider.\u003c\/li\u003e\n  \u003cli\u003eHighest Linearity and Guaranteed Consistency\u003c\/li\u003e\n  \u003cli\u003eUltra-Lightweight for Reduced Unsprung Mass\u003c\/li\u003e\n  \u003cli\u003eEach Spring Individually Tested\u003c\/li\u003e\n  \u003cli\u003eMade In U.S.A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade your motorcycle suspension with the Eibach EMS Fork Spring Kit, part number EIB904.040.1. Designed for riders who want more precise suspension tuning, this powersports spring kit provides a consistent foundation for balancing comfort, control, and performance across changing riding conditions. Eibach offers a full range of spring rates, allowing the suspension to be matched more closely to each rider and setup.\u003c\/p\u003e\n\u003cp\u003eEach spring is individually tested to help ensure dependable performance and consistent spring behavior. The lightweight construction helps reduce unsprung mass, which can support improved suspension response and handling. With precise fitment and straightforward installation, the Eibach EMS Fork Spring Kit is a practical upgrade for compatible Yamaha motocross applications.\u003c\/p\u003e\n\u003cp\u003eThis Eibach fork spring kit fits select 2014–2018 Yamaha YZ250F and YZ450F models. Confirm the required spring rate and motorcycle fitment before installation. The Eibach EMS Fork Spring Kit is made in the USA and is engineered for riders seeking repeatable suspension performance and adjustable setup potential.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOne Eibach EMS fork spring kit\u003c\/li\u003e\n  \u003cli\u003eInstallation-ready suspension spring components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eFits 2014 Yamaha YZ250F, 2014 Yamaha YZ450F, 2015 Yamaha YZ250F, 2015 Yamaha YZ450F, 2016 Yamaha YZ250F, 2016 Yamaha YZ450F, 2017 Yamaha YZ250F, 2017 Yamaha YZ450F, 2018 Yamaha YZ250F, and 2018 Yamaha YZ450F.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBrand: Eibach\u003c\/li\u003e\n  \u003cli\u003ePart Number: EIB904.040.1\u003c\/li\u003e\n  \u003cli\u003eProduct Type: EMS fork spring kit\u003c\/li\u003e\n  \u003cli\u003eApplication: Powersports motorcycle suspension\u003c\/li\u003e\n  \u003cli\u003eSpring Rate: 0.40 kg\/mm\u003c\/li\u003e\n  \u003cli\u003eMaterial: Lightweight performance spring steel\u003c\/li\u003e\n  \u003cli\u003eCountry of Origin: United States\u003c\/li\u003e\n  \u003cli\u003eQuantity: One kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpring Rate Selection: Available in a broad range of rates to help fine-tune suspension response for individual riders and riding conditions.\u003c\/li\u003e\n\u003cli\u003eConsistent Performance: Eibach EMS springs are designed for high linearity and dependable spring behavior throughout suspension travel.\u003c\/li\u003e\n\u003cli\u003eReduced Unsprung Mass: Lightweight construction helps support responsive suspension action and improved handling.\u003c\/li\u003e\n\u003cli\u003eIndividually Tested: Each spring is tested to help verify quality, consistency, and reliable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitments:\u003cbr\u003e\n2014 Yamaha YZ250F Base\u003cbr\u003e\n2014 Yamaha YZ450F Base\u003cbr\u003e\n2015 Yamaha YZ250F Base\u003cbr\u003e\n2015 Yamaha YZ450F Base\u003cbr\u003e\n2016 Yamaha YZ250F Base\u003cbr\u003e\n2016 Yamaha YZ450F Base\u003cbr\u003e\n2017 Yamaha YZ250F Base\u003cbr\u003e\n2017 Yamaha YZ450F Base\u003cbr\u003e\n2018 Yamaha YZ250F Base\u003cbr\u003e\n2018 Yamaha YZ450F Base\u003cbr\u003e\n2019 Yamaha WR450F Base\u003cbr\u003e\n2019 Yamaha YZ250F Base\u003cbr\u003e\n2019 Yamaha YZ450F Base\u003cbr\u003e\n2019 Yamaha YZ450FX Base\u003cbr\u003e\n2020 Kawasaki KX250 Base\u003cbr\u003e\n2020 Yamaha WR250F Base\u003cbr\u003e\n2020 Yamaha WR450F Base\u003cbr\u003e\n2020 Yamaha YZ250F Base\u003cbr\u003e\n2020 Yamaha YZ250FX Base\u003cbr\u003e\n2020 Yamaha YZ450F Base\u003cbr\u003e\n2020 Yamaha YZ450FX Base\u003cbr\u003e\n2021 Kawasaki KX250 Base\u003cbr\u003e\n2021 Kawasaki KX250X Base\u003cbr\u003e\n2021 Yamaha WR250F Base\u003cbr\u003e\n2021 Yamaha WR450F Base\u003cbr\u003e\n2021 Yamaha YZ250F Base\u003cbr\u003e\n2021 Yamaha YZ250FX Base\u003cbr\u003e\n2021 Yamaha YZ450F Base\u003cbr\u003e\n2021 Yamaha YZ450FX Base\u003cbr\u003e\n2022 Kawasaki KX250 Base\u003cbr\u003e\n2022 Kawasaki KX250X Base\u003cbr\u003e\n2022 Yamaha WR250F Base\u003cbr\u003e\n2022 Yamaha WR450F Base\u003cbr\u003e\n2022 Yamaha YZ125 Base\u003cbr\u003e\n2022 Yamaha YZ250 Base\u003cbr\u003e\n2022 Yamaha YZ250F Base\u003cbr\u003e\n2022 Yamaha YZ250FX Base\u003cbr\u003e\n2022 Yamaha YZ450F Base\u003cbr\u003e\n2022 Yamaha YZ450FX Base\u003cbr\u003e\n2023 Kawasaki KX250 Base\u003cbr\u003e\n2023 Kawasaki KX250X Base\u003cbr\u003e\n2023 Yamaha WR250F Base\u003cbr\u003e\n2023 Yamaha YZ125 Base\u003cbr\u003e\n2023 Yamaha YZ125X Base\u003cbr\u003e\n2023 Yamaha YZ250 Base\u003cbr\u003e\n2023 Yamaha YZ250F Base\u003cbr\u003e\n2023 Yamaha YZ250FX Base\u003cbr\u003e\n2023 Yamaha YZ450F Base\u003cbr\u003e\n2023 Yamaha YZ450FX Base\u003cbr\u003e\n2024 Kawasaki KX250 Base\u003cbr\u003e\n2024 Kawasaki KX250X Base\u003cbr\u003e\n2024 Yamaha WR250F Base\u003cbr\u003e\n2024 Yamaha YZ125 Base\u003cbr\u003e\n2024 Yamaha YZ125X Base\u003cbr\u003e\n2024 Yamaha YZ250 Base\u003cbr\u003e\n2024 Yamaha YZ250F Base\u003cbr\u003e\n2024 Yamaha YZ250FX Base\u003cbr\u003e\n2024 Yamaha YZ450F Base\u003cbr\u003e\n2024 Yamaha YZ450FX Base\u003cbr\u003e\n2025 Kawasaki KX250X Base\u003cbr\u003e\n2025 Yamaha WR250F Base\u003cbr\u003e\n2025 Yamaha YZ125 Base\u003cbr\u003e\n2025 Yamaha YZ125X Base\u003cbr\u003e\n2025 Yamaha YZ250 Base\u003cbr\u003e\n2025 Yamaha YZ250F Base\u003cbr\u003e\n2025 Yamaha YZ250FX Base\u003cbr\u003e\n2025 Yamaha YZ450F Base\u003cbr\u003e\n2025 Yamaha YZ450FX Base\u003cbr\u003e\n2026 Kawasaki KX250X Base\u003cbr\u003e\n2026 Yamaha WR250F Base\u003cbr\u003e\n2026 Yamaha YZ125 Base\u003cbr\u003e\n2026 Yamaha YZ125X Base\u003cbr\u003e\n2026 Yamaha YZ250 Base\u003cbr\u003e\n2026 Yamaha YZ250F Base\u003cbr\u003e\n2026 Yamaha YZ250FX Base\u003cbr\u003e\n2026 Yamaha YZ450F Base\u003cbr\u003e\n2026 Yamaha YZ450FX Base\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Y\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: powersports\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: 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