MudMan

I have a Kioti K9 and installed larger (taller) tires to get better traction on steep hills and in the mud. They work great, I can creep up almost anything and love them but now I can no longer use high range and would actually like it geared a little lower even in low range. I have over 300 hours on the tires and CVT belt with no issues but still would like to change the gearing a tad to give me back the option of high and low range. I’m getting ready to change the CVT belt and thought there might be something I could do while I have it apart. Anyone got any ideas? Thanks