CR250 Rear Brake Problems

 I have a 2000 CR250.  The rear brakes worked, but there has always
been a lot of travel in the rear brake pedal, and the adjuster was
almost as far as it could go.  On a recent ride, I somehow lost the
rear brake fluid reservoir cap (along with the 2 parts that go with
the cap).  I replaced all of the missing parts, cleaned out the
reservoir, filled it with DOT4 fluid, and bled the brakes.  I got my
brakes back pretty much to where they were before I lost the cap.
When I bled the brakes, the fluid that came out was very dark.

I decided to mess  with the rear pedal adjuster.  I had it adjusted
about all of the way out, and then tried bleeding the brakes again.
Something happend, and I lost all pressue in the rear brakes, and
can't get it to build again.  Is this a sign the master cylinder is
shot?  Should I replace it?  How difficult is a rebuild?

Thanks,

Troy

 

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Try "pressure bleeding" the rear brake by pushing (pumping) the fluid
from the bleeder back into the master cylinder.

This has always helped me when nothing else (short of a rebuild) has.


         Wudsracer/Jim Cook
          Smackover Racing
         '06 Gas Gas DE300
        '82 Husqvarna XC250
           Team LAGNAF