Originally Posted by glye

Do you get it when you increase speed in a straight line? That's a bit worrying, in that case.

I get such a noise only in hard turns, which indicates that the fork/swingarm is flexing. So long as it is only a slight noise it is harmless. And in this case alignment may not help: If I could get it to be silent in hard turns, it might then make noise in a straight line instead.

You can of course check that the caliper is centered over the brake disk. And if the brake disk is bent, you can bend it back (don't use fingers directly, you don't want skin fat on the disk). I use clean tissue paper on the disk when I do this. And of course check that the wheel is properly set in the dropouts and that the quick release is screwed tight.