I would like to change my final drive ratio, ex; if I was going 60mph. in 6th. gear, what would it take to go 55mph. at the same rpm. I am thinking of a larger rear pulley, but not sure how many teeth it would take to get where I want to be? or I could change the front to a smaller pulley, but again , how many teeth? The reason for the change is the conditions where I ride ,are that I am always going from 5th to 6th, and 6th to 5th, so. with a little change I could always be in 6th. Thanks!