CRF 320mm rotor caliper bracket 250 450 R.
I recently ran into an issue with a 2019 Honda CRF450R moto wheel upgrade to 320 mm front rotor. I had two of these filled by my machinist, with the correct alloy so that I could set the proper caliper slide distance for the newer style caliper. This will allow you to set the correct distance and place the slide pin where you would like it to make correct to get the 320mm rotor to work.