I do own a 1982 Honda Gl 500 Silverwing , 51000 km on her clock. Resently the bike's front brakes started to "drag" - the pistons on one ( or both sides ?) does not want to release , even though I repeatedly bled the system free of old brake fluid and any air. The brake handle also stays very hard and stiff. If any one of your experienced top guys can assist with advice , you will make my day ! The only thing I can think of is that the "back" flow in the master cyllinder seems to be blocked ?