Radius X Auto Clutch Description: RadiusX is a high performance centrifugal auto clutch combining our TorqDrive and EXP technologies. TorqDrive provides more clutch disks in less space, allowing for maximum performance within your bike?s existing clutch footprint. You retain full control of shifting and use of your clutch lever with no compromise in power delivery. Features: Dead-on clutch engagement every time Take off and stop in gear without using clutch lever ? no more stalls Experience maximum power delivery Confidently navigate traffic and slow speed conditions TorqDrive clutch pack delivers higher torque capacity and increased power transfer Rekluse sleeves eliminate basket wear and notching Standard clutch lever function with full override No modification to stock components Shifting transmission remains unchanged (clutch lever use is recommended for shifting) Please be sure your model/year is listed below before purchasing. Honda CRF450R 2017 Honda CRF450RX 2017 Honda CRF450R 2018 Honda CRF450RX 2018 Honda CRF450R 2019 Honda CRF450RX 2019 Honda CRF450R 2020 Honda CRF450RX 2020 Honda CRF450RWE 2019 Honda CRF450RWE 2020 Honda CRF450R-S 2022 Fit:Rekluse xls This fitment information is based upon the stock version of the unit referenced and any accessory added or other modification could invalidate the quick reference information provided.