It is the little what looks like terry cloth cover for the front disk brake reservoir? I was watching the Isle of Man race coverage this week on Velocity channel and noticed the same thing on some of the racing bikes. It is a peculiar add on in so much as it is fabric and I can't quite get what it's purpose is? Keep it cooler? Look better?
This attachment is from another members posted pic today.
This attachment is from another members posted pic today.
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