Eibach EIB904.040.1 EMS Fork Spring Kit for Yamaha YZ250F and YZ450F

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.

• Eibach EMS Springs Available in a Full Range of Rates to Fine Tune Suspension to each Rider.
• Highest Linearity and Guaranteed Consistency
• Ultra-Lightweight for Reduced Unsprung Mass
• Each Spring Individually Tested
• Made In U.S.A.

Upgrade 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.

Each 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.

This 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.

What's Included

• One Eibach EMS fork spring kit
• Installation-ready suspension spring components

Fitment

Fits 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.

Specifications

• Brand: Eibach
• Part Number: EIB904.040.1
• Product Type: EMS fork spring kit
• Application: Powersports motorcycle suspension
• Spring Rate: 0.40 kg/mm
• Material: Lightweight performance spring steel
• Country of Origin: United States
• Quantity: One kit

Features:

• Spring Rate Selection: Available in a broad range of rates to help fine-tune suspension response for individual riders and riding conditions.
• Consistent Performance: Eibach EMS springs are designed for high linearity and dependable spring behavior throughout suspension travel.
• Reduced Unsprung Mass: Lightweight construction helps support responsive suspension action and improved handling.
• Individually Tested: Each spring is tested to help verify quality, consistency, and reliable performance.

Fitments:
2014 Yamaha YZ250F Base
2014 Yamaha YZ450F Base
2015 Yamaha YZ250F Base
2015 Yamaha YZ450F Base
2016 Yamaha YZ250F Base
2016 Yamaha YZ450F Base
2017 Yamaha YZ250F Base
2017 Yamaha YZ450F Base
2018 Yamaha YZ250F Base
2018 Yamaha YZ450F Base
2019 Yamaha WR450F Base
2019 Yamaha YZ250F Base
2019 Yamaha YZ450F Base
2019 Yamaha YZ450FX Base
2020 Kawasaki KX250 Base
2020 Yamaha WR250F Base
2020 Yamaha WR450F Base
2020 Yamaha YZ250F Base
2020 Yamaha YZ250FX Base
2020 Yamaha YZ450F Base
2020 Yamaha YZ450FX Base
2021 Kawasaki KX250 Base
2021 Kawasaki KX250X Base
2021 Yamaha WR250F Base
2021 Yamaha WR450F Base
2021 Yamaha YZ250F Base
2021 Yamaha YZ250FX Base
2021 Yamaha YZ450F Base
2021 Yamaha YZ450FX Base
2022 Kawasaki KX250 Base
2022 Kawasaki KX250X Base
2022 Yamaha WR250F Base
2022 Yamaha WR450F Base
2022 Yamaha YZ125 Base
2022 Yamaha YZ250 Base
2022 Yamaha YZ250F Base
2022 Yamaha YZ250FX Base
2022 Yamaha YZ450F Base
2022 Yamaha YZ450FX Base
2023 Kawasaki KX250 Base
2023 Kawasaki KX250X Base
2023 Yamaha WR250F Base
2023 Yamaha YZ125 Base
2023 Yamaha YZ125X Base
2023 Yamaha YZ250 Base
2023 Yamaha YZ250F Base
2023 Yamaha YZ250FX Base
2023 Yamaha YZ450F Base
2023 Yamaha YZ450FX Base
2024 Kawasaki KX250 Base
2024 Kawasaki KX250X Base
2024 Yamaha WR250F Base
2024 Yamaha YZ125 Base
2024 Yamaha YZ125X Base
2024 Yamaha YZ250 Base
2024 Yamaha YZ250F Base
2024 Yamaha YZ250FX Base
2024 Yamaha YZ450F Base
2024 Yamaha YZ450FX Base
2025 Kawasaki KX250X Base
2025 Yamaha WR250F Base
2025 Yamaha YZ125 Base
2025 Yamaha YZ125X Base
2025 Yamaha YZ250 Base
2025 Yamaha YZ250F Base
2025 Yamaha YZ250FX Base
2025 Yamaha YZ450F Base
2025 Yamaha YZ450FX Base
2026 Kawasaki KX250X Base
2026 Yamaha WR250F Base
2026 Yamaha YZ125 Base
2026 Yamaha YZ125X Base
2026 Yamaha YZ250 Base
2026 Yamaha YZ250F Base
2026 Yamaha YZ250FX Base
2026 Yamaha YZ450F Base
2026 Yamaha YZ450FX Base

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1