I'm a little late for the thread but I wanted to advise that my 87 Westy
also has spongy brakes.  You push once and it is a little soft; pushing
again immediately gives a firmer feel.  This is after the dealer serviced
the brake fluid (replace & bleed), new metallic pads (with resurfaced
rotors) and my own attempt to Re-bleed the brakes.
While I'm writing I would like to ask for advice on camping to and around
Yellowstone.  I am coming from Indiana so I am looking for good park or
camp stops along the way.  Thanks in advance for any and all advice.
Ed