4 Wheel disc, soft pedal

SGBARRACUDA said
My first thought since you say you have bleed the brakes is the small 15/16 bore of the MC. And you really shouldn't be pinching the rear brake hose.

Normally I wouldn't, but the need to diag overrides that. If I need to replace the hose afterwards, fine. But I wanted to narrow down the problem, if possible.

Killer6 said
Check with an assistant for one or both over-returning, is there a visable gap using a small flashlight tight to the rotor & peering in opposite through towards light. If the pins are not moving free(I've seen too much heavy caliper grease develop enuff suction in blind- hole setups to actually pull the caliper towards the bracket & rotor, compressing the piston & leaving a gap between outer pad to rotor.), do the brackets align the caliper(s) with the rotor(s) properly w/o flexing/binding/pushback? Some piston seals drag/hang up in the bore & cause the piston to over-retract when the pressure is released. I've seen all of these in the field. That's where I'd start...good luck! How about a couple pics of the setup..?

I can't answer any of those for certain tonight, but good things to check for. I might pull the calipers tomorrow and check that they extend and don't retract on their own. The caliper pins don't go into a blind hole, so that's probably not an issue. But checking freedom of movement on the pins themselves is another good one to check.

Biff said
I know you said you pulled the Calipers off to bleed them are the bleeders at the top of the calipers ,grasping at straws here ?

Yes, bleeders are up, I removed them, used a block to simulate the rotor and tried rolling them around while using the vacuum bleeder. Nothing,.