.....since changing out the 15 tooth front sprocket to a 16 tooth, I've come to the conclusion that the speedo being right on is not worth loosing an average of 10mpg.:thumbdown: I thought after the first tank I may have been flogging it too much to see if I could tell the difference in performance, which I did not. I do like the new rpm location at cruising speed, but not for 10 miles per gallon........ I know some here had said here was really no difference if mileage, even some that said mileage was better.....I find that hard to believe. Suppose it's back to the 15..