Open box sale. This clutch was installed onto a bike but never used, customer ended up going a different direction. Fits 21 - 23 Honda CRF450 R/RX Part Number RMS-6301102 RadiusX Clutch - CRF450 A high-performance stall-preventing auto clutch is just a clutch pack swap away, RadiusX combines TorqDrive friction disk technology with the innovative EXP auto clutch disk, TorqDrive provides more clutch disks in less space, delivering high performance auto function within the framework of the stock clutch, RadiusX prevents engine stalls so you can focus on your line and let the clutch do the rest, This clutch offers increased power transfer over OEM and on the fly external adjustment, TorqDrive friction disks provide longer clutch life with less adjustment over time, With RadiusX, standard clutch lever function is retained with full override.