A lot of people like using screw drivers and pry bars or opening up the bleed valves. I don't like that method too much because it forces your to bleed the system later while using screw drivers and pry bars, well I don't really know what people do with those. lol
- Pop the hood and unscrew the cap to the brake fluid reservoir
- With the wheel off, sit on the ground or something else with the rotor/caliper assembly in front of you
- Take both hands and place them behind the brake caliper, aka the far side of the caliper.
- Pull the inboard side of the caliper towards you. This compresses the piston enough so you can slide the caliper off of the rotor. It takes a bit of force to compress the caliper. I had to do this a couple of times until I pushed the piston enough.
Also, it is normal for the pads to stay behind as you pull the caliper off. This is pretty messy so be prepared to wipe your hands on something.