When you say "new brakes", I am guessing you mean pads, and all other components stayed the same.
The only time I have experienced brake judder was after changing brake pads to a compound that was not compatible with the compound that I had been using, which remained embedded in the brake discs. Mine went away after a few hard racing laps though.
The OEM pads are actually pretty good stuff. I would not scoff at them. All of the Pagid compounds are known to be compatible with them.
__________________
Kippis
986S
991S
Van Diemen RF97
|