EBC Rotors and tolerances

[JOHN SOLIDAY]

Chamfered holes are better for keeping them from cracking but I've seen a lot of EOM stuff with straight drill holes so the alloy must be harder nowadays.  I chamfered all of my holes on my old racing bikes but my newer CBR600RR has straight drills.  I figure you couldn't hurt anything my chamfering them lightly with a Christmas Tree bit.  



> Date: Wed, 12 Mar 2008 14:55:39 -0700
> From: steven at bixbys.net
> To: gpzlist at micapeak.com
> Subject: Re: EBC Rotors and tolerances
> 
> I'm pretty sure the (new, Galfer) pads are in straight and correctly,
> although it's very hard to verify this without removing the caliper
> (after removing the RH muffler).   I've put them in cockeyed once
> before and the most noticable trait is a spongy pedal since it's
> clamping unevenly and flexing the slider pins..
> 
> The other thing I noticed with these rotors is the very-sharp edges in
> the holes; I seem to recall the old rotor had slightly chamfered
> holes, but this thing's drilled holes are sharp-edged.  Anyone think
> that's a factor?
> 
> On 3/12/08, scapco at ecentral.com <scapco at ecentral.com> wrote:
> > Steve,
> >
> > That really does sound like a bad rotor.  One thing to
> > check, how are the pads looking and are they installed
> > straight?  The amount of variance doesn't sound that bad,
> > but it's either the rotor or somehting ins't on straight.
> >
> > Charles S.
> >
> > >
> > >However, I'm not sure if that's within normal tolerances
> > >for a rotor, does anyone know?   I'm sure it's not given
> > >the amount of pulsing the brake does.
> > >
> > >Whaddya all know?