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Old 08-03-2018, 07:50 PM
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harry harry is offline
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Join Date: May 2005
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Hi Tricky, you've made a common mistake of thinking a bigger bore master cylinder gives more braking effort.
Thinking that it moves more fluid would increase braking effort.

But its the other way round a smaller M/cyl means the pedal pressure multiplied by the leverage ratio is applied to a smaller piston.

Because the smaller piston has the same force applied to a smaller area means the fluid pressure is higher which gives more brake effort. But the pedal/lever moves further.

Hope this helps.
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