SPF brake firmness

[Mike Christian]

I may resort to that if nothing else works.

Are there any recommendations out there for back flushing the system?

 

[DaveM]

If you are manually bleeding brakes by pushing pedal try doing front and rear simultaneously. This allows MC to fully travel and not be limited by balance bar. If you are pressure bleeding only this is not necessary.

 

[Markus]

Mike, I also replaced the brake fluid on my early SPF not too long ago.
Unfortunately I'm heading out for work - so quick comments only.
To get to outer bleeding nipples I removed all four wheels to access the calipers easily.
I used a vaccum pump like this:

Mityvac Vacuum Pump Kit - 8000

This is the original Mityvac hand vacuum pump kit used by service professionals worldwide for performing hundreds of automotive diagnostic and mechanical tests and for one-person brake bleeding. The MV8000 kit contains the most popular Selectline hand vacuum pump with vacuum gauge and...

www.autobodytoolmart.com

There are some good videos on YT e.g.

I had a certain sequenz for bleeding the calipers - I will look that up later....
Overall bleeding was not too bad and I got all the old brake fluid out easily - however, proper bleeding (getting all the air out) was more time consuming.
Hope this helps.