As mentioned previously... your bikes ability to "self adjust" air fuel ratio is only in the closed loop range of cells within the fueling map. If you have Tune ECU, and you pull up the factory map and go to the AFR tables, the areas of auto adjustment will be shown as the cells that are listed as 14.5 All other cells outside of this 14.5 range will be controlled by what's written into the map. If your goal is better performance, (who's isn't) when you installed the free flowing air cleaner, then the self adjusting areas of the map will not really be seen when your hard on the throttle. Outside of the closed loop portion of the map you will only see better performance in the ranges of the map that are running richer AFRs, assuming that your free flowing air cleaner is actually able to flow more air in them specified ranges. To sum it up.... If the factory fueling is set to run a bit richer than optimum, in the higher load cells , AND your new air filter flows better in them particular ranges, then I would say that you will see an increase in performance, provided that all other things that affect airflow through the engine are able to efficiently flow the additional air POTENTIAL offered by the new air cleaner. I stress the word potential because the air cleaner is just one of the possible restrictions in the path of airflow.