Looks like normal wear and tear to me.My 999S has the same tyres fitted and has a 'static strip' visable,...I have'nt got a problem with it,...the Powers are great tyres.I'm pretty sure there is nowt wrong with them.
Just looked at the dates of the threads.Still on the same pair of tyres after nearly a year and 5k miles?:puzzled:

Yeah im sure they are fine best tyres i ever had, feel good in wet to considering not much tread, I love the tread design makes tyre look real fat to:D:D

And the new 2ct powers have dual compound to so be even better:D