We've run into issues with the driver side front axle nut coming loose. This is more common on cars run in the desert, but running a castle nut with a cotter pin will keep your axles secure for any type of riding.
These fit '20-'22 KRX 1000's with the smaller axle nuts.
Install is easy, you simple remove your old axle nut, we recommend applying red loctite to the axle threads, install your new nut and torque to 110ft/lbs, install a cotter pin through the hole in the end of the axle shaft and you're done. (If the hole in the axle does not line up tighten the axle nut until it does, do not loosen the nut to get it to line up)