Improve front suspension balance and handling with the Race Tech Fork Spring 0.40 kg/mm, manufacturer part number FRSP 444540 and vendor part number 200-444540. Designed for riders seeking accurate spring rates and predictable suspension performance, this high-performance fork spring helps address the under-sprung condition common on sport and off-road motorcycles. Proper spring selection supports improved chassis control, rider confidence, and consistent response across changing terrain.
Manufactured from chrome silicon wire, the Race Tech spring offers a high stiffness-to-mass ratio while maintaining dependable durability. Each spring is shot-peened and heat treated to resist fatigue and help prevent spring sag or “sacking out” during use. Its accurately specified 0.40 kg/mm rate provides a reliable foundation for suspension tuning and can be selected to better match rider weight, riding style, and motorcycle setup.
This fork spring fits select 2019 Yamaha YZ125, YZ250, and YZ250X models; 2017 Yamaha YZ250X; 2006 and 2007 Yamaha YZ125; and 2007 KTM 250 SX, 250 SX-F, and 450 SX-F motorcycles. Verify the exact model year, suspension configuration, and required spring rate before installation. The Race Tech Fork Spring 0.40 kg/mm is a professional suspension component for riders and technicians who require consistent rates, durable construction, and dependable fitment.
Features:
- Spring Rate: 0.40 kg/mm for controlled and predictable fork performance
- Construction: Made from high-quality chrome silicon wire
- Stiffness: High stiffness-to-mass ratio supports responsive suspension tuning
- Durability: Shot-peened and heat treated to resist fatigue
- Performance: Accurate spring rate helps maintain consistent handling
- Reliability: Designed to resist sag and spring “sacking out”
- Fitment: Select Yamaha YZ125, YZ250, YZ250X, KTM 250 SX, KTM 250 SX-F, and KTM 450 SX-F models
- Brand: Race Tech
- Manufacturer Part Number: FRSP 444540
- Vendor Part Number: 200-444540
Fitment:
2006 Yamaha YZ125
2006 Yamaha YZ250
2006 Yamaha YZ250F
2006 Yamaha YZ450F
2007 KTM 250 SX
2007 KTM 250 SX-F
2007 KTM 450 SX-F
2007 Yamaha YZ125
2007 Yamaha YZ250
2007 Yamaha YZ250F
2007 Yamaha YZ450F
2008 Yamaha YZ125
2008 Yamaha YZ250
2008 Yamaha YZ250F
2008 Yamaha YZ450F
2009 Yamaha YZ125
2009 Yamaha YZ250
2009 Yamaha YZ250F
2009 Yamaha YZ450F
2010 Yamaha YZ125
2010 Yamaha YZ250
2010 Yamaha YZ250F
2011 Yamaha YZ125
2011 Yamaha YZ250
2011 Yamaha YZ250F
2012 Yamaha WR450F
2012 Yamaha YZ125
2012 Yamaha YZ250
2012 Yamaha YZ250F
2013 Yamaha WR450F
2013 Yamaha YZ125
2013 Yamaha YZ250
2013 Yamaha YZ250F
2014 Yamaha WR450F
2014 Yamaha YZ125
2014 Yamaha YZ250
2015 Yamaha WR450F
2015 Yamaha YZ125
2015 Yamaha YZ250
2016 Yamaha WR450F
2016 Yamaha YZ125
2016 Yamaha YZ250
2017 Yamaha YZ125
2017 Yamaha YZ250
2017 Yamaha YZ250X
2018 Yamaha YZ125
2018 Yamaha YZ250
2018 Yamaha YZ250X
2019 Sherco 125 SC Cross Country
2019 Sherco 125 SE-R Factory
2019 Sherco 125 SE-R Racing
2019 Sherco 250 SC Cross Country
2019 Sherco 250 SC-F Cross Country
2019 Sherco 250 SE-R Factory
2019 Sherco 250 SE-R Racing
2019 Sherco 250 SEF-R Factory
2019 Sherco 300 SC Cross Country
2019 Sherco 300 SC-F Cross Country
2019 Sherco 300 SE-R Factory
2019 Sherco 300 SEF-R Factory
2019 Sherco 450 SC-F Cross Country
2019 Sherco 450 SEF-R Factory
2019 Sherco 500 SC-F Cross Country
2019 Sherco 500 SEF-R Factory
2019 Yamaha YZ125
2019 Yamaha YZ250
2019 Yamaha YZ250X
2020 Beta 125 RR (RE)
2020 Beta 250 RR (RE)
2020 Beta 300 RR (RE)
2020 Beta 350 RR (RE)
2020 Beta 390 RR (RE)
2020 Beta 430 RR (RE)
2020 Beta 480 RR (RE)
2020 Sherco 125 SC Cross Country
2020 Sherco 125 SE-R Factory
2020 Sherco 125 SE-R Racing
2020 Sherco 250 SC Cross Country
2020 Sherco 250 SC-F Cross Country
2020 Sherco 250 SE-R Factory
2020 Sherco 250 SE-R Racing
2020 Sherco 250 SEF-R Factory
2020 Sherco 300 SC Cross Country
2020 Sherco 300 SC-F Cross Country
2020 Sherco 300 SE-R Factory
2020 Sherco 300 SEF-R Factory
2020 Sherco 450 SC-F Cross Country
2020 Sherco 450 SEF-R Factory
2020 Sherco 500 SC-F Cross Country
2020 Sherco 500 SEF-R Factory
2020 Yamaha YZ125
2020 Yamaha YZ125X
2020 Yamaha YZ250
2020 Yamaha YZ250X
2021 Beta 125 RR (RE)
2021 Beta 250 RR (RE)
2021 Beta 300 RR (RE)
2021 Beta 350 RR (RE)
2021 Beta 390 RR (RE)
2021 Beta 430 RR (RE)
2021 Beta 480 RR (RE)
2021 Sherco 125 SE-R Factory
2021 Sherco 125 SE-R Racing
2021 Sherco 250 SE-R Factory
2021 Sherco 250 SE-R Racing
2021 Sherco 250 SEF-R Factory
2021 Sherco 450 SEF-R Factory
2021 Sherco 500 SEF-R Factory
2021 Yamaha YZ125
2021 Yamaha YZ125X
2021 Yamaha YZ250
2021 Yamaha YZ250X
2022 Beta 125 RR (RE)
2022 Beta 200 RR (RE)
2022 Beta 250 RR (RE)
2022 Beta 300 RR (RE)
2022 Beta 350 RR (RE)
2022 Beta 390 RR (RE)
2022 Beta 430 RR (RE)
2022 Beta 480 RR (RE)
2022 Sherco 125 SE-R Factory
2022 Sherco 250 SE-R Factory
2022 Sherco 250 SE-R Racing
2022 Sherco 250 SEF-R Factory
2022 Sherco 450 SEF-R Factory
2022 Sherco 500 SEF-R Factory
2023 Sherco 125 SE-R Factory
2023 Sherco 250 SE-R Factory
2023 Sherco 250 SEF-R Factory
2023 Sherco 450 SEF-R Factory
2023 Sherco 500 SEF-R Factory