I have a 2009 with only 8000km/5000miles and when I accelerate hard when I shift first to second there seems to be a phase in of the clutch grabbing. I don't notice it in other gears but definitely in 1-2. It seems to be a few seconds where the revs pick up then slow down as the clutch catches fully and the bike pulls in a linear fashion.

I've had a lot of bikes and I remember one many years ago having a problem like this, but I think it was just a clutch cable adjustment or something, I can't remember so any advice would be appreciated.