Fuel Moto 530 chain drive replacement rear sprockets.
The stock final ratio equivalent is 24/51. For quicker acceleration use 24T front and/or increase rear tooth count; or if you are looking to go the opposite way and lower the highway RPM's from stock use the 25T and/or lower the rear tooth count. We find the best all around combo for most performance oriented riders to to be 24T front/54T rear.
Note: due to the limited adjustment with the stock swingarm we've found 24/53 & 25/54 do not offer sufficient range of adjustment.