I'm getting front brake judder from my 916, I've looked at the discs and they seem fine. I'm going to try removing the calipers tonight and have another look! Any other ideas?
On my SS it was the semi floating pins sticking - I just spun the wheel and tapped the disc (gently) with a wooden mallet. Problem has never returned. Though it could be a fair few other things of course like a glazed disc or pad. Also this subject has been well covered in the tech section and will be other solutions in there.