Wouldn't change down
I had this problem and did a search on here for a similar thread.
The issue with mine is that the lever would feel solid when trying to change down, even out of top coming off a motorway.
Took it back to the dealer, they reamed a bush in the gear lever out, this didn't help.
Following the comment on the thread I found, from Tobers, if I recall correctly, which described my problem and the output shaft that the clutch sits on (all mechanics forgive my ignorance), is meant to be greased when they assemble the bikes, but it would appear not all are being done and the clutch grips the shaft and does not completely disengage. It can be remedied if you blip the throtle on the downchange.
Anyway having explained this to my dealer, they "reported to B*W" that the gearbox seal might be leaking!?! they were then able to strip the back of the bike, under warranty, taking off the gearbox I believe and guess what output shaft as dry as a bone and rusty.
They replaced the clutch as they had the bike apart, and greased thge output5 shaft, now all is well with the down change.
Any doubts get it in under warranty.
Cheers
Pavs