Hi, my bike has done a little over 5000kms. Coming to a halt in the last part of stop less than 10KPH, the front brakes squeal under the light brake pressure.... a little annoying. I was going to give the pads a clean. If I undo the pad pins, will the pads come out or does the whole caliper need to come off for the pads to come out. I pushed back the pistons, but the pads won't slide out of the caliper. Any advice would help.