I have 300 miles on my 2008 and every once and a while while shifting from 2nd to 3rd or 3rd to 4th the tranny locks up ie will not shift up! I then have to shift down a gear and retry, very frustrating when 75 cars are behind you. I mean there is nothing when shifting up...just air...my friend has a '07 and said he has also experienced this. Any thoughts or threads as to what is going on? Never had this type of problem with my other bikes.
Ankhman
From your post it seems you're no novice to motorcycles so please take this as such.
Early on with my 06, I noticed something similar between 2nd and 3rd. I'd shift and get nothing (as you stated, air). I found that I wasn't allowing the shifter to return fully after the 1-2 shift and began pointing my toe down further after the shift. This seemed to help but was unnatural to me, so I adjusted the shifter to fit my boot (imagine that). With time, this also seem to lessen the tendency for this occurance. Don't know if this is what you're experiencing but I never down shifted, just let my boot drop till it was clear of the arm. Time and the rod adjustment helped me.
Good Luck.