Pressure relief ports due to the bike being so fast.
Air rushing under the headlight area needs to have an exit point or all the bodywork would just explode and fly off. So Yamamaha engineered those 4 forward slots ( 2 on each side ) to let said air escape from within the upper cowling.
As such, it also creates a low pressure area which in turn helps hold the bike to the pavement instead of wanting to take off like a jet.
Ducati has winglets..... FJR as PRP slots.....
or drainage holes as COG posted....
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
2013 Stone Grey