The REKLUSE RadiusX 4.0 Clutch is an updated expanding friction disk assembly designed for specified Husqvarna and KTM motorcycles. Its base material is updated to provide better strength in the high-temperature environments created by clutch systems, while redesigned internal wall bases improve strength and rigidity for a more connected lever feel.
The outside of the EXP disk uses friction pads that match the proprietary friction design found on REKLUSE TorqDrive clutch plates. This design helps match oil-flow characteristics in the clutch pack beneath, promoting improved cooling capability and consistent operation. EXP 4.0 wedges now use rolling contact with built-in pins, reducing friction and resistance compared with sliding contact for smoother engagement and a more responsive feel.
The updated engagement curve is designed to better match modern motorcycle engine characteristics. The assembly also provides more tuning options through varying wedge weights and EXP springs, supporting more direct power delivery, improved durability and rider-focused functionality. Manufacturer part number: RMS-8313080. Fits 2017 Husqvarna FE 450, 2018 Husqvarna FE 450, 2017 Husqvarna FE501, 2018 Husqvarna FE501, 2021 Husqvarna FE501, 2017 KTM 450 EXC-F Six Days, 2019 KTM 450 EXC-F Six Days, 2022 KTM 450 EXC-F Six Days, 2023 KTM 450 EXC-F, and 2021 or 2023 KTM 500 EXC-F.
Features:
- Updated EXP assembly: Uses a revised expanding friction disk assembly with a base material updated for improved strength in high-temperature clutch environments.
- Redesigned internal wall bases: Improve strength and rigidity to help provide a more connected lever feel.
- Proprietary friction design: EXP disk friction pads match the design found on REKLUSE TorqDrive clutch plates.
- Improved oil-flow matching: Helps promote improved cooling capability and consistent clutch operation.
- EXP 4.0 rolling-contact wedges: Built-in pins reduce friction and resistance compared with sliding contact.
- Updated engagement curve: Designed to better match modern motorcycle engine characteristics.
- Tuning options: Supports varying wedge weights and EXP springs.
- Fitment: Fits specified 2017–2023 Husqvarna FE 450, Husqvarna FE501, KTM 450 EXC-F Six Days, KTM 450 EXC-F and KTM 500 EXC-F applications.
Fitment:
2017 Husqvarna FE 450
2017 Husqvarna FE501
2017 KTM 450 EXC-F
2017 KTM 450 EXC-F Six Days
2017 KTM 500 EXC-F
2017 KTM 500 EXC-F Six Days
2018 Husqvarna FE 450
2018 Husqvarna FE501
2018 KTM 450 EXC Six Days
2018 KTM 450 EXC-F
2018 KTM 450 EXC-F Six Days
2018 KTM 500 EXC-F
2018 KTM 500 EXC-F Six Days
2019 Husqvarna FE 450
2019 Husqvarna FE501
2019 KTM 450 EXC-F
2019 KTM 450 EXC-F Six Days
2019 KTM 500 EXC-F
2019 KTM 500 EXC-F Six Days
2020 Husqvarna FE 450
2020 Husqvarna FE501
2020 Husqvarna FE501S
2020 KTM 450 EXC-F
2020 KTM 450 EXC-F Six Days
2020 KTM 500 EXC-F
2020 KTM 500 EXC-F Six Days
2020 KTM 500 XCF-W
2021 Husqvarna FE 450
2021 Husqvarna FE501
2021 Husqvarna FE501S
2021 KTM 450 EXC-F
2021 KTM 450 EXC-F Six Days
2021 KTM 500 EXC-F
2021 KTM 500 EXC-F Six Days
2021 KTM 500 XCF-W
2022 KTM 450 EXC-F
2022 KTM 450 EXC-F Six Days
2022 KTM 500 EXC-F
2022 KTM 500 EXC-F Six Days
2023 KTM 450 EXC-F
2023 KTM 450 XCF-W
2023 KTM 500 EXC-F
2023 KTM 500 EXC-F Six Days