Description
- Updated EXP (expanding friction disk) assembly
- Base material updated to provide better strength in high temperature environments, critical for the heat clutch systems create
- Internal wall bases redesigned for strength and rigidity, which helps translate to a more connected lever feel for the rider
- On the outside of the EXP disk, friction pads now match proprietary friction design found on Rekluse TorqDrive clutch plates, this design helps match oil flow characteristics on the clutch pack beneath, promoting improved cooling capability and consistent operation
- EXP 4.0 wedges have been improved to now use rolling contact with built-in pins
- Rolling pins versus sliding creates less friction and resistance, providing smoother engagement and a more responsive feel, creating stronger power delivery overall
- More direct power delivery, improved durability, and rider-focused functionality
- Engagement curve designs updated to better match modern motorcycle engine characteristics
- More tuning options with varying wedge weights and EXP springs
Fitments
2025 Gas Gas MC250F Factory Edition – – 2024-2025 Gas Gas MC 450F – – 2024 Husqvarna FC 450 Rockstar Edition – – 2023-2025 KTM 450 SX-F – – 2023-2025 Husqvarna FC450 – – 2023-2025 KTM 450 XC-F – – 2023-2024 Husqvarna FX450 – – 2022-2024 KTM 450 SX-F Factory Edition – – 2022 Husqvarna FC450 Rockstar Edition – – Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer’s information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.






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