Cheers Tony, Ttask master I won't be applying this logic to all motorcycle related purchases.
I'm actually replacing the disc and then learned that I had to buy new pads as well. I went to unscrew a bolt in the disc and it rounded (typical) it looks like they are the original bolts and it is the original disc, my bike is a 2006 model. I really can not be arsed messing about with rounded bolts, I am out of my depth so I am geting a professional to do it.