Hello Have a problem regarding the brake VA on a K12 (Bj. 08, 88Tkm). Changed discs + pads. Parts from the accessories, but not cheap China scrap. When changing everything was neatly disassembled, cleaned, cleaned and the new parts are fitted with brake paste again. Brake pistons have been reset with appropriate tools and also went back without any problems. Brake piston cuffs are without any damage, which is why I exclude rust. Now the symptoms: If the brake is cold both wheels are free and turn perfectly. After a short ride you notice quite quickly that the brake is making more and more and does not solve it. The longer you drive the worse it gets. Directly after the ride the brake is fixed. Both wheels can no longer be turned! What we have already tried: – entire brake system is tested on damage and leakages, without being able to rule out any recognisable parts – to the same time again.