I would suggest always bleeding all four wheels after doing brake work.  Also, since you are
doing it anyway, you may as well change the fluid.  Just bleed all four wheels until the brake
fluid coming out is clean.  It take a bit of time for the first one, since you are clearing out
the master cylinder, but goes quickly on the others.  If it has been a while since it was done,
there will be a distinct color difference between the old fluid and the new.

Oh, and if you are thinking about bleeding the brakes anytime soon, it couldn't hurt to get
under there right now and spray Kroil, WD-40, or something similar on all those bleeder
fittings.

Bill

----- Original Message -----
From: "Barry Mercer" <bjmercer@SYMPATICO.CA>

> Hello.  I'm going to replace shoes and drums as well as wheel cylinders
> on my 88 Westy.
>
> Because the westy has a dual circuit brake system... does that mean I
> just bleed the rear brakes as I work, or all four wheels??