Originally Posted by Redbullet

There are no issues with sticky pistons, nor with bed in. The pads simply self clean and work very well only if I brake hard 10-20 times from high speed within (roughly) 50-100 km. I rode in a hilly area during a holiday and they cleaned themselves after the first 2-3 hard brakes, then everything worked ok for 10 days as long as I needed frequent hard braking. I can't "feed" them at home on flat roads with such long and hard braking, unless I do some kind of repeated bed in at every 50-100 km.

At mild and rare braking, the pads produce a very fine black residue that feels almost as lubing in the fingers, like very fine graphite powder. I guess that this powder clogs the pores of the pad and the metallic insertions, that don't wear during mild braking, take in a larger extend the contact with the rotor, generating poor braking performance. Now, again: if I brake long and hard 2-3 times on a descend, everything comes back to normal. But I have no such descents at home...