Ive got a 2015 FZ-07 which comes with a 16 tooth on the front and a 43 on the rear. I decided to go with a 17 on the front and leave the back alone. I will say that i wish i would have done this sooner!! 1st gear is actually used now! lol This is a gearing ratio that Yamaha should have made the bike come stock with. I also went down to the 520 pitch on both sprockets and chain as well. So with all that being done, im even MORE in love with this bike!!!