Ted has done some work in this area, so look for his posts on the topic.
I have a 42T rear sprocket, and have put a different throttle tube on the handlebar - the stock gives around 1/6 turn only to full throttle, the one I have gives around 1/4 turn (so a little more turning to full throttle). Plus I have had the ecu Woolich tuned with onroad datalogging to try and give a better throttle response. All this has helped somewhat.
But, as Rick150 writes, these bikes seem to be more sensitive to throttle input anyway. I have just got used to its way of working.