Right about the beginning of the COVID madness, I bought a 2006 RSV and my '86 was put into storage. When we bought the new house, a little over a year ago now, I pulled it out to ride it to a storage unit closer to the new homestead. I found the rear brake pedal was mushy and went "to the floor" with little effect on braking.
I looked for sings of leaks, found nothing. The rear reservoir was completely full. I figured the rear master needed rebuilt. I didn't have time then to do anything with it.
BTW, it is still the factory, linked configuration.
I just got around to rebuilding the rear MC and it definitely needed it. With everything back together, using a Mity Vac and brake bleeder kit, I cannot get fluid to either the rear caliper or the bleeder at the steering neck. When I crack the banjo nut that feeds the front line, I get a rush of fluid when pressing the pedal. With the banjo nut tight, there is no pressure built up at all when pumping the pedal and the reservoir level never drops when pulling a vacuum on either bleeder fitting.
Any Ideas?