I just bought a 94 Polaris 400 with 1800 miles on it. It's in great condition but it needs brakes. I bought front brakes and decided to put them on. I am not a bad mechanic but I couldn't figure out how to remove the old pads. ( Never seen this setup before) & didn't want to break something. There seems to be two pins that hold the brakes to the calipers. How do you remove them? Thanks in advance