yes check the booster pushrod free play from the round nub to the bottom of the piston recess & want ~.060" or a bit less and take off the lines from the M/C and stick a drill bit deep into each cone and you'll feel the RPV if it has one as it's just a piece of neoprene on a spring & you'll feel the springiness. Cant have a OE type RPV on the disc side they hold too much pressure