Brakes pulling WAS: Why is one front rotor running than the other??(ufo's)

[SuffolkD at aol.com]

My guess is that a brake line bleed is in order.
If you have air in one side vs the other, you'll get more clamping pressure 
on one vs the other rotor.  Hence a pull to one side. -Scott by BOSTON
> 
> As you know i have just done the front rotors on urs4, the nearside is 
> running hotter than offside (uk if that makes a difference) and it pulls a bit 
> under braking to the left which it didn't before. I have just pulled the rotor 
> and pads out on that side, can't see anything obvious (and yes Dave and others 
> it is possible to pull it 15 minutes, thanks for the advice). Recleaned 
> where the pads fit onto the caliper and a dab of copperslip again, piston moves 
> fine in the caliper and the caliper sliders move freely too. Is this just a 
> bedding process??? Should i be worried??
> Thoughts gentlemen please.
> Thanks
>