Note how the uneven piston travel in the caliper has the pads sitting at an angle. This can cause power loss and premature pad wear.

Cocked pistons like those shown above can eventually cause seal issues or even crack while being used.

Uneven pistons in a four piston caliper.

Begin to balance the pistons by driving both back into their bores. A butter knife works well for this job because it's not too stiff but is sturdy enough to get the job done. As always, make sure that your dummy brake pads have been installed - never push on the pads you intend to use.

We're applying pressure to the moving piston in order to balance the system.

Clean, even, and balanced. These brakes will offer optimum performance when installed.