rear brake light not working

Not sure on adjustment but i know mine has to be pressed hard for it to come on as there seems like alot of travel before it lights up....
my mates MT-07 is really sensitive so he's always trailing his brake so it's lit up alot when i'm following him.

cheers for that image. Looks like I have to take a few bits off to access it??

Had this on mine, it's really easy to adjust and you can do it by hand without taking anything off.

Mine gets clogged up with dirt and just needs cleaning to make it come on again