The REKLUSE RadiusX 4.0 Clutch is an updated expanding friction disk assembly designed for select Yamaha motorcycle applications. Its base material is updated for improved strength in high-temperature environments, while redesigned internal wall bases provide increased strength and rigidity to help deliver a more connected lever feel.
The EXP disk features friction pads based on the proprietary friction design found on REKLUSE TorqDrive clutch plates. This design matches the oil-flow characteristics of the clutch pack beneath, promoting improved cooling capability and consistent operation. EXP 4.0 wedges use rolling contact with built-in pins instead of sliding contact, reducing friction and resistance for smoother engagement, a more responsive feel and stronger power delivery.
Updated engagement curve designs are intended to better match modern motorcycle engine characteristics. The assembly also provides more tuning options through varying wedge weights and EXP springs. Distributor part number: RMS-8307076. Manufacturer part number: RMS-8307076. Vehicle fitment includes 2020, 2016, 2019 and 2021 Yamaha YZ450F models; 2019 Yamaha YZ450FX; 2021, 2022 and 2023 Yamaha WR450F; and 2011 and 2013 Yamaha YZ450F models.
Features:
- Updated EXP assembly: Uses an updated base material designed to provide better strength in high-temperature environments.
- Redesigned internal walls: Strengthened and rigid internal wall bases help provide a more connected lever feel.
- TorqDrive-inspired friction design: Friction pads help match oil-flow characteristics in the clutch pack beneath.
- Improved cooling capability: The friction-pad design promotes improved cooling and consistent operation.
- EXP 4.0 rolling wedges: Built-in pins provide rolling contact to reduce friction and resistance.
- Rider-focused performance: Supports smoother engagement, responsive feel, stronger power delivery and improved durability.
- Tuning options: Engagement characteristics can be adjusted with varying wedge weights and EXP springs.
- Vehicle fitment: Fits select 2011, 2013, 2016, 2019, 2020 and 2021 Yamaha YZ450F models, 2019 Yamaha YZ450FX, and 2021, 2022 and 2023 Yamaha WR450F models.
Fitment:
2010 Yamaha YZ450F
2011 Yamaha YZ450F
2012 Yamaha YZ450F
2013 Yamaha YZ450F
2014 Yamaha YZ450F
2015 Yamaha YZ450F
2016 Yamaha YZ450F
2017 Yamaha YZ450F
2018 Yamaha YZ450F
2019 Yamaha WR450F
2019 Yamaha YZ450F
2019 Yamaha YZ450FX
2020 Yamaha WR450F
2020 Yamaha YZ450F
2020 Yamaha YZ450FX
2021 Yamaha WR450F
2021 Yamaha YZ450F
2021 Yamaha YZ450FX
2022 Yamaha WR450F
2022 Yamaha YZ450F
2022 Yamaha YZ450FX
2023 Yamaha WR450F
2023 Yamaha YZ450FX