Ask ten Beta owners what the worst maintenance task on a Beta is and eight of ten will say bleeding the rear brake. The other two don’t work on their own bikes.  OK maybe that’s an exaggeration but it really is evil. My rear brake has been squeeky and weird since a get off last year that bent the disk. Replacing the disk helped but still not right so I went to replace the pads and the hex head on the pad retaining bolt stripped out. Ugh! Screw it. Replace the caliper though I know it meant