Motor turns up briefly, but doesn’t translate the power to the tires – clutch?

Hello to each other, I noticed yesterday during an extensive ride on the highway that with my Z1000 in the 6th gear something incomprehensible happens to me. At about 8-9 thousand revolutions and quite strong acceleration, it turned up, but did not transmit power, I did not get faster for a fraction of a second. I tried the whole one-two times and it was always the same, only in the 6th gear at 8-9 thousand revolutions. In other gears passed Not that. For me, that sounds like a slippery clutch, but my machine just ran 4 years young and 10,000km… Can that be that after the mileage the clutch is already over, or can that have another reason? Hope someone can help me here, also have a few months warranty on the Kawa. PS: I treat the machine as if it were my own child, if someone should think that.