{"product_id":"race-tech-fork-spring-0-40-kg-mm-frsp-444940-for-yamaha-yz250f-yz450f-wr450f-and-suzuki-rm-z250","title":"Race Tech Fork Spring 0.40 kg\/mm FRSP 444940 for Yamaha YZ250F, YZ450F, WR450F and Suzuki RM-Z250","description":"The first step to great handling and predictability is selecting proper spring rates. With over 500 Hi-Performance Springs to choose from, Race Tech is almost guaranteed to have the spring you need. Sportbikes are generally under-sprung for the average rider, causing the bike to be unbalanced and unpredictable.\n\u003cp\u003eUpgrade 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.\u003c\/p\u003e\u003cp\u003eSportbikes 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.\u003c\/p\u003e\u003cp\u003eFitment 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.”\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpring Rate: 0.40 kg\/mm for controlled front-fork support\u003c\/li\u003e\n\u003cli\u003eConstruction: High-quality chrome silicon wire\u003c\/li\u003e\n\u003cli\u003eStiffness: High stiffness-to-mass ratio for responsive suspension performance\u003c\/li\u003e\n\u003cli\u003eDurability: Shot-peened and heat-treated for extended service life\u003c\/li\u003e\n\u003cli\u003ePerformance: Accurate spring rate with resistance to spring fatigue\u003c\/li\u003e\n\u003cli\u003eFitment: Select 2014–2019 Yamaha YZ250F, 2019 Yamaha YZ450F, select 2019–2021 Yamaha WR450F, and 2019 Suzuki RM-Z250 models\u003c\/li\u003e\n\u003cli\u003eBrand: Race Tech\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: FRSP 444940\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 200-444940\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2014 Yamaha YZ250F\u003cbr\u003e\n2014 Yamaha YZ450F\u003cbr\u003e\n2015 Yamaha YZ250F\u003cbr\u003e\n2015 Yamaha YZ450F\u003cbr\u003e\n2016 Yamaha YZ250F\u003cbr\u003e\n2016 Yamaha YZ450F\u003cbr\u003e\n2017 Yamaha YZ250F\u003cbr\u003e\n2017 Yamaha YZ450F\u003cbr\u003e\n2018 Yamaha YZ250F\u003cbr\u003e\n2018 Yamaha YZ450F\u003cbr\u003e\n2019 Suzuki RM-Z250\u003cbr\u003e\n2019 Yamaha WR450F\u003cbr\u003e\n2019 Yamaha YZ250F\u003cbr\u003e\n2019 Yamaha YZ450F\u003cbr\u003e\n2019 Yamaha YZ450FX\u003cbr\u003e\n2020 Kawasaki KX250F\u003cbr\u003e\n2020 Suzuki RM-Z250\u003cbr\u003e\n2020 Yamaha WR450F\u003cbr\u003e\n2020 Yamaha YZ250F\u003cbr\u003e\n2020 Yamaha YZ250FX\u003cbr\u003e\n2020 Yamaha YZ450F\u003cbr\u003e\n2020 Yamaha YZ450FX\u003cbr\u003e\n2021 Kawasaki KX250F\u003cbr\u003e\n2021 Kawasaki KX250X\u003cbr\u003e\n2021 Suzuki RM-Z250\u003cbr\u003e\n2021 Yamaha WR450F\u003cbr\u003e\n2021 Yamaha YZ250F\u003cbr\u003e\n2021 Yamaha YZ250FX\u003cbr\u003e\n2021 Yamaha YZ450F\u003cbr\u003e\n2021 Yamaha YZ450FX\u003cbr\u003e\n2022 Kawasaki KX250F\u003cbr\u003e\n2022 Kawasaki KX250X\u003cbr\u003e\n2022 Kawasaki KX450SR\u003cbr\u003e\n2022 Suzuki RM-Z250\u003cbr\u003e\n2022 Yamaha WR450F\u003cbr\u003e\n2022 Yamaha YZ125\u003cbr\u003e\n2022 Yamaha YZ125X\u003cbr\u003e\n2022 Yamaha YZ250\u003cbr\u003e\n2022 Yamaha YZ250F\u003cbr\u003e\n2022 Yamaha YZ250FX\u003cbr\u003e\n2022 Yamaha YZ250X\u003cbr\u003e\n2022 Yamaha YZ450F\u003cbr\u003e\n2022 Yamaha YZ450FX\u003cbr\u003e\n2023 Beta 125 RR (RE)\u003cbr\u003e\n2023 Beta 200 RR (RE)\u003cbr\u003e\n2023 Beta 350 RR (RE)\u003cbr\u003e\n2023 Beta 390 RR (RE)\u003cbr\u003e\n2023 Beta 480 RR (RE)\u003cbr\u003e\n2023 Kawasaki KX250F\u003cbr\u003e\n2023 Kawasaki KX250X\u003cbr\u003e\n2023 Suzuki RM-Z250\u003cbr\u003e\n2023 Yamaha WR450F\u003cbr\u003e\n2023 Yamaha YZ125\u003cbr\u003e\n2023 Yamaha YZ125X\u003cbr\u003e\n2023 Yamaha YZ250\u003cbr\u003e\n2023 Yamaha YZ250F\u003cbr\u003e\n2023 Yamaha YZ250FX\u003cbr\u003e\n2023 Yamaha YZ250X\u003cbr\u003e\n2023 Yamaha YZ450F\u003cbr\u003e\n2023 Yamaha YZ450FX\u003cbr\u003e\n2024 Kawasaki KX250F\u003cbr\u003e\n2024 Kawasaki KX250X\u003cbr\u003e\n2024 Suzuki RM-Z250\u003cbr\u003e\n2024 Yamaha WR450F\u003cbr\u003e\n2024 Yamaha YZ125\u003cbr\u003e\n2024 Yamaha YZ125X\u003cbr\u003e\n2024 Yamaha YZ250\u003cbr\u003e\n2024 Yamaha YZ250F\u003cbr\u003e\n2024 Yamaha YZ250FX\u003cbr\u003e\n2024 Yamaha YZ250X\u003cbr\u003e\n2024 Yamaha YZ450F\u003cbr\u003e\n2024 Yamaha YZ450FX","brand":"RACE TECH","offers":[{"title":"Default Title","offer_id":67558385123563,"sku":"200-444940","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/70e8-5be9d0756ad73_fd0768f1-83b0-4563-927e-d6dce06029c1.jpg?v=1790760801","url":"https:\/\/ctracingservices.com\/products\/race-tech-fork-spring-0-40-kg-mm-frsp-444940-for-yamaha-yz250f-yz450f-wr450f-and-suzuki-rm-z250","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}