kwak zzr

just looked at a thread in(tuning and tweeking) about adjusting your throttle bodies on the injected versions of the sv.
when you fit a can is it ok to leave your set up how it is if all is running ok?
i was told that the ecu remaps itself up to about 5% so you can get away with a can,but you need retuning if you fit more, k+n,p commander ect?
a race can with a removeable baffle cant be set up can it cuz your fueling changes when you fit and remove your baff?
i dont know do you?
daz