JohnnyO
MAXRL is correct (he is a wizard for sure)........I bought a drilled PHR rotor........stock thickness.........The EX caliper does not use the entire disk, probably the outer 2/3...........Scrambler 73 has a buddy that thins and does cutouts for the area not used, I think you can also get drilled if desired........they look pretty cool........2lbs lighter............and my PHR rotor showed up the day before he PM'd me or I would have had my stock one modded..........JRD did my shift linkage bushings............., he thins rotors, don't know about cutouts...........very nice and recomend him as well, top notch service, fast and cheap.
Also, when I put the system together and was bleeding it, used a vacuum pump, tried normal bleeding, etc........could not get it to build pressure.........my buddy suggested pushing the piston in a bit further than the lever would go on the MC manually with a screwdriver........bubbles came out, then it built pressure and was good.
I also rebuilt my caliper and MC..........the MC piston kit did not match the one in my EX MC.........I had to reuse my original.......so don't destroy it when you (and if) rebuild it.
THX Phil