How do you change air gas ratio on your motorcycle?

Your motorcycle has to be "re-jetted" if its a carborated motor. If its electronic fuel injection, it would have to be reprogrammed and hooked up to a dyno machine. Some EFI motors can receive downloads from a computer--this is done by the service department at a dealership however (its not something you can do at home on your own).

You need to know what circut of the carb that needs re-jetting. Fuel injected engines can be reprogramed if you have the reprogramming information and or a laptop w/ the approiate fuel pack. W/ a good fuel pack you can advance/ retard you ignition system according to speed and rpm. There a lost you can do on your own once you understand what fuel pack can accomidate all around adjustments in one unit.