The complete brake adjuster B6-04-0770 (inventory number 3-0710) with spherical pressure pieces ensures particularly even contact and adjustment of the brake shoes in the drum on the BMW Isetta front axle. During brake restoration, it replaces worn or stiff original parts, thereby improving pedal feel and brake force distribution. It is important to ensure proper installation with lightly greased sliding surfaces so that the spherical pressure pieces can operate with minimal play and low corrosion over the long term.