It seems that everyone has their own preference when it comes to gearing but for me the original 16/42 setup is a perfect fit. These engines are not big displacement potato, potato power plants and enjoy turning rpms which put them squarely into their power band. They respond well while providing both good performance and very reasonable fuel mileage in the upper rev range and you can actually pull top gear in virtually all conditions e.x. windy, hilly, two up etc. These are only my opinions from riding my 03 since new and having tried a couple different different gear changes. I know that with it now being a 904 I could pull more gear but as of yet have not dug out any of the other barely used sprockets I have which are just gathering dust. Maybe some day who knows. Lol
