Race Tech Fork Spring 0.42 kg/mm for 2017–2019 Honda, Suzuki and Kawasaki Models – FRSP 454742

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.

Improve front-end balance, handling, and suspension predictability with the Race Tech Fork Spring 0.42 kg/mm, manufacturer part number FRSP 454742 and vendor part number 200-454742. Designed for select motocross and off-road motorcycles, this high-performance fork spring helps provide a more appropriate spring rate for riders whose original equipment suspension is under-sprung.

Manufactured from chrome silicon wire, the Race Tech spring delivers a high stiffness-to-mass ratio while maintaining consistent performance under demanding riding conditions. Each spring is shot-peened and heat-treated to support long-term durability, accurate spring rates, and resistance to sagging or “sacking out.” This makes it a reliable upgrade for riders seeking improved control, stability, and confidence over varied terrain.

Fitment includes the 2019 Honda CRF450R, 2019 Honda CRF450RX, 2019 Honda CRF250R, 2019 Honda CRF450R W.E., 2019 Honda CRF250RX, 2019 Suzuki RM-Z450, and 2019 Kawasaki KX450F. It also fits the 2017 Honda CRF450RX, 2017 Honda CRF450R, and 2018 Honda CRF450R. Verify motorcycle model, year, and required spring rate before installation to ensure proper suspension setup. Race Tech is known for precision-engineered suspension components developed for consistent performance and dependable fitment.

Features:

• Spring rate: 0.42 kg/mm for improved front suspension balance and control
• Brand: Race Tech
• Manufacturer part number: FRSP 454742
• Vendor part number: 200-454742
• Constructed from high-quality chrome silicon wire
• High stiffness-to-mass ratio supports responsive suspension performance
• Shot-peened and heat-treated for enhanced durability
• Accurate spring rate helps reduce suspension inconsistency
• Designed to resist sagging and long-term spring fatigue
• Fits select 2017–2019 Honda CRF450R, CRF450RX, CRF250R, and CRF250RX models, plus select Suzuki RM-Z450 and Kawasaki KX450F models

Fitment:
2017 Honda CRF450R
2017 Honda CRF450RX
2018 Honda CRF250R
2018 Honda CRF450R
2018 Honda CRF450RX
2018 Suzuki RM-Z450
2019 Honda CRF250R
2019 Honda CRF250RX
2019 Honda CRF450L
2019 Honda CRF450R
2019 Honda CRF450R W.E.
2019 Honda CRF450RX
2019 Honda CRF450X
2019 Kawasaki KX450F
2019 Suzuki RM-Z450
2020 Honda CRF250R
2020 Honda CRF250RX
2020 Honda CRF450L
2020 Honda CRF450R
2020 Honda CRF450R W.E.
2020 Honda CRF450RX
2020 Honda CRF450X
2020 Kawasaki KX450F
2020 Suzuki RM-Z450
2021 Honda CRF250R
2021 Honda CRF250RX
2021 Honda CRF450L
2021 Honda CRF450R
2021 Honda CRF450R W.E.
2021 Honda CRF450RL
2021 Honda CRF450RX
2021 Honda CRF450X
2021 Kawasaki KX450F
2021 Kawasaki KX450X
2021 Suzuki RM-Z450
2022 Honda CRF250R
2022 Honda CRF250RX
2022 Honda CRF450R
2022 Honda CRF450R W.E.
2022 Honda CRF450RL
2022 Honda CRF450RX
2022 Honda CRF450X
2022 Kawasaki KX450F
2022 Kawasaki KX450X
2022 Suzuki RM-Z450
2023 Honda CRF250R
2023 Honda CRF250RX
2023 Honda CRF450R
2023 Honda CRF450R W.E.
2023 Honda CRF450RL
2023 Honda CRF450RX
2023 Honda CRF450X
2023 Kawasaki KX450F
2023 Kawasaki KX450X
2023 Suzuki RM-Z450
2024 Honda CRF250R
2024 Honda CRF250RX
2024 Honda CRF450R
2024 Honda CRF450R W.E.
2024 Honda CRF450RL
2024 Honda CRF450RX
2024 Honda CRF450X
2024 Kawasaki KX450F
2024 Kawasaki KX450X
2024 Suzuki RM-Z450