Hey,Your not alone.I have the same noise after the same mod.It really bothered me until I checked it out(checked the fluid after riding a couple of times)no loose metal in the fluid or odd wear marks on any of the components.Both race-tech springs have no sag and the preload is still where I left it @ 10mm.When I installed the new springs I did not used the bottom clip washers.(bottom of the spring)The only thing I can think of is that maybe the spring bows slightly and taps the inside of the fork tube apon initial load.But likeI said,seems ok after 250 mi.Please let me know if you figure it out.:)