Eureka!!! That must be why I keep having a soft brake pedal. I've bled the rear brakes a dozen times, and no joy. I've never done the lower right from the rear reservoir. I'm all over this tomorrow. Thanks.
TG,
It does help to bleed that front caliper, when bleeding the rear brakes. I can give you a few good tips there, also. The usual bleeding process probably
will not get the excellent results that you want.
First, clean and lube the rear brake pivot, before you start the brake bleeding. This is normal maintenance anyway, but it is important here. Next, rig your catch tube from the bleeder vertically (at least a few inches upward) to keep the air out of the catch tube while you work.
Then, do the brake bleeding as you would normally, sure, but add this item: Once you press the brake lever down,
side-step the pedal, letting the pedal
spring itself back up, as rapidly as it can go. Repeat as needed. Allowing the brake pedal come up with your foot on it is just
too slow to move air out of the system, which is what you want gone. These tips should give you a like-new brake pedal result, when finished. SpeedBleeders do help, also.
.