Upgrade front-suspension control with the Race Tech Fork Spring 0.40 kg/mm, manufacturer part number FRSP 444940 and vendor part number 200-444940. Designed for riders who need properly matched fork spring rates, this high-performance replacement spring helps improve handling balance, front-end feedback, and predictability on compatible motocross and off-road motorcycles. Race Tech offers more than 500 spring rates to help riders select the correct setup for their motorcycle and riding requirements.
Sportbikes and off-road motorcycles can be under-sprung for the rider, which may contribute to an unbalanced feel and inconsistent suspension response. The 0.40 kg/mm spring rate is engineered to provide dependable support while maintaining controlled fork movement. This spring is made from chrome silicon wire and features a high stiffness-to-mass ratio for efficient suspension performance. Shot peening and heat treatment improve durability under repeated compression and demanding riding conditions.
Fitment includes select 2014–2019 Yamaha YZ250F models, the 2019 Yamaha YZ450F, select 2019–2021 Yamaha WR450F models, and the 2019 Suzuki RM-Z250. Verify the motorcycle year, model, existing spring specification, and rider setup before installation. Professional installation and suspension tuning are recommended for the best results. The Race Tech FRSP 444940 is built for accurate spring rates, consistent performance, and resistance to spring fatigue or “sacking out.”
Features:
- Spring Rate: 0.40 kg/mm for controlled front-fork support
- Construction: High-quality chrome silicon wire
- Stiffness: High stiffness-to-mass ratio for responsive suspension performance
- Durability: Shot-peened and heat-treated for extended service life
- Performance: Accurate spring rate with resistance to spring fatigue
- Fitment: Select 2014–2019 Yamaha YZ250F, 2019 Yamaha YZ450F, select 2019–2021 Yamaha WR450F, and 2019 Suzuki RM-Z250 models
- Brand: Race Tech
- Manufacturer Part Number: FRSP 444940
- Vendor Part Number: 200-444940
Fitment:
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
2018 Yamaha YZ450F
2019 Suzuki RM-Z250
2019 Yamaha WR450F
2019 Yamaha YZ250F
2019 Yamaha YZ450F
2019 Yamaha YZ450FX
2020 Kawasaki KX250F
2020 Suzuki RM-Z250
2020 Yamaha WR450F
2020 Yamaha YZ250F
2020 Yamaha YZ250FX
2020 Yamaha YZ450F
2020 Yamaha YZ450FX
2021 Kawasaki KX250F
2021 Kawasaki KX250X
2021 Suzuki RM-Z250
2021 Yamaha WR450F
2021 Yamaha YZ250F
2021 Yamaha YZ250FX
2021 Yamaha YZ450F
2021 Yamaha YZ450FX
2022 Kawasaki KX250F
2022 Kawasaki KX250X
2022 Kawasaki KX450SR
2022 Suzuki RM-Z250
2022 Yamaha WR450F
2022 Yamaha YZ125
2022 Yamaha YZ125X
2022 Yamaha YZ250
2022 Yamaha YZ250F
2022 Yamaha YZ250FX
2022 Yamaha YZ250X
2022 Yamaha YZ450F
2022 Yamaha YZ450FX
2023 Beta 125 RR (RE)
2023 Beta 200 RR (RE)
2023 Beta 350 RR (RE)
2023 Beta 390 RR (RE)
2023 Beta 480 RR (RE)
2023 Kawasaki KX250F
2023 Kawasaki KX250X
2023 Suzuki RM-Z250
2023 Yamaha WR450F
2023 Yamaha YZ125
2023 Yamaha YZ125X
2023 Yamaha YZ250
2023 Yamaha YZ250F
2023 Yamaha YZ250FX
2023 Yamaha YZ250X
2023 Yamaha YZ450F
2023 Yamaha YZ450FX
2024 Kawasaki KX250F
2024 Kawasaki KX250X
2024 Suzuki RM-Z250
2024 Yamaha WR450F
2024 Yamaha YZ125
2024 Yamaha YZ125X
2024 Yamaha YZ250
2024 Yamaha YZ250F
2024 Yamaha YZ250FX
2024 Yamaha YZ250X
2024 Yamaha YZ450F
2024 Yamaha YZ450FX