As I understand it, the difference between a 7/8" and 1" rear cylinder is as follows. A given distance of brake pedal travel will displace a given quantity of fluid, which will move the piston in a 7/8" cylinder slightly further than a 1"(due to volume behind piston). This in itself increases the braking at the rear relative to the front. So in effect changing rear cylinder diameter alters the front/rear braking balance, regardless of whether a servo or PRV is fitted. Just to confuse things, a larger diameter cylinder will be able to excert a greater amount of mechanical force for a given amount of pedal pressure. Thoughts?
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