Rear brakes locking up

It seems like my rear brakes lock up too easy. I did a search and it seems that they’re supposed to lock up before the fronts, but it doesn’t seem to take that much pressure and the back of the RZR is coming around too easy.

I check the pads for wear and they still look good. the rotors don’t have any wear and the pads are all wearing even. They measure about 9/64 does anyone know how thick they are new?

Is there any adjustment to change the pressure to the rears?