| I think bleeding thr rear is only a temporary repair though. I really struggled with my SPS.... I could get a perfect pedal for a couple of weeks & then back to spongy. I gave in & bought a new genuine master cylinder & guess what ........... exactly the same.
On my 998 (which has 50mm pipes) it was even worse ......... I think the problem is heat transfer from the exhausts to the master cylinder. I have bled the brakes through,using the technique described above, and with good quality fluid. I used Castrol Response dot4 but I am sure that any dot4 will be as good. I then wrapped the master cylinder in heat resistant aluminium cloth.
It is a bit early to say this is the definitive answer, but 3 months later it is still OK. |