I've just fitted some new rotors on the existing bells I've used new bolts etc and it's all been torqued to the right settings. I'm using a newish set of pads from the old discs that had cracked.

Now I've been out to bed them in and it looks as if only the bottom and top of the disc is meeting with the pad it looks as if the middle has had no contact at all.

Do I need new pads?

 

you could try with a bit of sand paper on some wood "a flat surface" and then give them another try, tbh it just sounds like your pads have contoured to your old rotors so flatting your pads down a little should do the trick

*edit* or if it doesn't bother you another set of pads would cure it straight off, but depends if there is still alot of meat on the old set and don't wanna just bin them

 

What kind of sandpaper would you use?

 

Any help on this would be apprieciated. Take it you mean a pretty rough/corse sandpaper?