I don't really think it's anything to worry about. Even new bikes make sounds. You have that much metal moving around and around and around it's allways going to make a slight mechanical sound.
Now I'd be worried if it didn't make any mechanical sound. Like when was the last time you heard a bike that made no mechanical sound.....................and to do the shims at every 5000km is over kill!
I'd put it down to normal engine noise, unless you'v been to the drag strip doing 11sec runs

Then I'd be worried.
My 10cents
snr