Removing Caliper Pins ???

Trying to remove the Rear Brake Caliper Pins ( 2 ) to change the pads on my 77' KZ1000A. Won't budge. Grabbed them with a pair of needle nose pliers to see if they would even move or rotate -no go? Is there a trick to removing them?

GOT IT !!! Brake Pad Pins just rusty and grungy. After soaking them in ATF/Acetone Mix was able to move the pins by twisting them to free them up. Then pulled right own.