I am trying to replace rear brake pads on my non ABS ST1100 but one or both pistons seems to be seized,my prob is that there are aftermarket exhausts fitted and I cant take back wheel off without removing exhausts which I don't really want to do. So does anyone know if it is possible to take caliper off without removing caliper hanger.I managed to undo rearmost slider pin but don't know if the forward one unbolts allowing me to remove caliper. Any suggestions or advice please

Thanks Snobs