Normal on my GS, ...BUT...
...picked up a ticking sound under braking in my front brakes. 760 miles on the bike. Off to AJ today, lickity split (

) the techie finds out it is due to a failed washer between the bolt and disk. Ah, easy I say. Nope, needs a new disk, gotta order it. Huh? Well, seems like it comes as a pressed kit - no spare washers
Moral of the story - get it seen to under warrantee, 'coz the solution may be more than one bargains for.