The REKLUSE RadiusX 4.0 Clutch is an updated expanding friction disk assembly designed for Yamaha YFZ450R applications. Its revised base material provides improved strength in the high-temperature environments created by clutch systems, while redesigned internal wall bases enhance strength and rigidity for a more connected lever feel.
The outside of the EXP disk uses friction pads with the proprietary friction design found on REKLUSE TorqDrive clutch plates. This design matches oil-flow characteristics in the clutch pack beneath, promoting improved cooling capability and consistent operation. EXP 4.0 wedges use rolling contact with built-in pins, reducing friction and resistance compared with sliding contact 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 clutch also provides more tuning options through varying wedge weights and EXP springs. Distributor part number: RMS-8307080. Manufacturer part number: RMS-8307080. Fits 2018 Yamaha YFZ450R, 2015 Yamaha YFZ450R SE, 2016 Yamaha YFZ450R, 2022 Yamaha YFZ450R, 2023 Yamaha YFZ450R, 2014 Yamaha YFZ450R, 2017 Yamaha YFZ450R SE, 2019 Yamaha YFZ450R SE, 2024 Yamaha YFZ450R SE, and 2025 Yamaha YFZ450R.
Features:
- Updated EXP 4.0 Assembly: Expanding friction disk assembly with revised materials and design updates.
- High-Temperature Strength: Updated base material provides better strength in high-temperature clutch environments.
- Enhanced Lever Feel: Redesigned internal wall bases improve strength and rigidity for a more connected lever feel.
- Proprietary Friction Design: Outside EXP disk friction pads match the design used on REKLUSE TorqDrive clutch plates.
- Improved Cooling Capability: Friction pad design matches oil-flow characteristics in the clutch pack beneath.
- Rolling Wedge Contact: EXP 4.0 wedges use built-in pins for reduced friction and resistance during engagement.
- Responsive Power Delivery: Smoother engagement and a more responsive feel support stronger power delivery.
- Tuning Options: Varying wedge weights and EXP springs provide additional tuning options.
- Vehicle Fitment: Fits select 2014–2025 Yamaha YFZ450R and YFZ450R SE models listed in the product description.
Fitment:
2013 Yamaha YFZ450R SE
2014 Yamaha YFZ450R
2014 Yamaha YFZ450R SE
2015 Yamaha YFZ450R
2015 Yamaha YFZ450R SE
2016 Yamaha YFZ450R
2016 Yamaha YFZ450R SE
2017 Yamaha YFZ450R
2017 Yamaha YFZ450R SE
2018 Yamaha YFZ450R
2018 Yamaha YFZ450R SE
2019 Yamaha YFZ450R
2019 Yamaha YFZ450R SE
2020 Yamaha YFZ450R
2020 Yamaha YFZ450R SE
2021 Yamaha YFZ450R
2021 Yamaha YFZ450R SE
2022 Yamaha YFZ450R
2022 Yamaha YFZ450R SE
2023 Yamaha YFZ450R
2023 Yamaha YFZ450R SE
2024 Yamaha YFZ450R
2024 Yamaha YFZ450R SE
2025 Yamaha YFZ450R
2025 Yamaha YFZ450R SE