[Eman]

It's a straight bore MC so pressure has to be the same at both ports. The rear piston will move slightly quicker than the front one as they are tied together with a spring. The rear port will provide a little more volume so if you have front disc and rear drum plumb the rear to the front disc. On many MC's the one section will have a larger reservoir as that was the end that was plumbed to the front dis brakes as disc brakes are self adjusting by using fluid to fill behind the piston as the pads wear.