This is going to sound stupid Dingo. And I may lose some credibility. But I've since learned from this experience. And that's what matters. Anyways... I was trying out some rather soft fork springs and light fork valving, and was experimenting to see if I engaged in super-hard braking, whether my forks would dive too much and bottom out, for fear that if I was ever in an accident-type situation, that I could brake hard and not have to worry about having to lose control over the forks bottoming. Essentially, I was seeing if I needed to alter the fork oil level / air gap. Anyways, I remember doing several runs down my street, grabbing the front brakes super hard, not allowing them time to cool down, and then grabbing again, and finally, probably the death blow, was then parking the bike after not riding it around letting the rotors and pads cool before letting the bike sit. I think after that experiment, I started to notice the shudder/pulsing.