Nelson, if you can listen to your forks with a screwdriver and pull up on your bars at the same time, I'd consider a future in a travelling circus if I were you. :tongue:
You did hold the screwdriver the right way around when you heaved up on the clip-ons, didn't you? Or are you walking around with it through your head? AL.
I wonder if your guide and slider bushes are worn, allowing the stanchion to rock a bit over it's length. I have just been out to see if my forks do it....I have new bushes in mine and there is a tiny amount of movement when I have the front supported and I pull/push on the fork bottoms.....(similar to a small amount of headstock bearing play)......before the bushes were replaced, there was quite a lot of movement and clonking, mainly in the up direction. Also, the cartridge thingy tends to make a noise on full extension of the rod....... AL.
My 749 did it, now that I have 749 forks in monster (stripped 2k miles ago) they also do it, when they do it together with loose pads and floating disc one hell of a clank that can be.