Master cylinder for c8a

[Grant Bowker]

Originally Posted by rob love

If the external dimensions of the new master cylinder are ok, could you not get a machine shop to bore it out to 1-1/4 and install a rebuild kit?

Without measuring the cylinder, my concern about overboring the master cylinder would be the small passage vertically into the fluid reservoir. Most masters I've seen have a larger diameter dimple cast in the base of the fluid reservoir and then a smaller hole drilled into the cylinder. If the overbore extended the working cylinder into the larger part of the hole to the reservoir, would the larger hole risk damaging the rubber cup? You might also need to redo the clip-in cap at the pushrod end of the cylinder depending on how much material remains for it to seat against. I'm not saying it can't be done, just things to check....