No issues with fueling on my 1090RR. When standard it was fine, with MV Corse OL4 titanium slip on exhaust it was also fine. Then I fit Silmoto titanium headers, decat, BMC airfilter, removed snorkels from airbox and remapped using a Rapidbike EVO tuner.
Results below,picked up 13bhp at the back wheel....fueling and throttle response is spot on.
2015 Brutale 1090RR