05 ZX-6R sprockets

Hi to all,
After a great day at EC on Sunday, I was wondering why my recently purchased 05 ZX-6R was feeling a little anaemic out of the corners. Close inspection of the rear sprocket reveals that the previous owner had put a 40 tooth on. Why? I don't know. Maybe he wanted to get better fuel economy on the freeway
.
My understanding is the 15/43 is the stock set up. I am thinking of going -1/+2 to 14/45. Does this sound right or am I barking up the wrong tree?
Cheers
After a great day at EC on Sunday, I was wondering why my recently purchased 05 ZX-6R was feeling a little anaemic out of the corners. Close inspection of the rear sprocket reveals that the previous owner had put a 40 tooth on. Why? I don't know. Maybe he wanted to get better fuel economy on the freeway

My understanding is the 15/43 is the stock set up. I am thinking of going -1/+2 to 14/45. Does this sound right or am I barking up the wrong tree?
Cheers