The license plate light housing on my 2010 V was sloppy loose when I got it (it could flop up & down). The dealer started to tell me that it was normal... then I showed him how all the Ninjas in his showroom (which had the same lamp assembly) weren’t loose. He then said I’d have to leave it so they could take it apart when they got a chance to look at it. (Yeah, right! I just picked it up last night and now it’s a beautiful day to ride!).
That night I took it apart myself and found that while the screws that held the housing on were tight, they were bottomed out against the ferrules that they thread into. I don’t know if the ferrules were molded/cut too long or what but the solution was to put a washer on each of the screws that had an inside diameter which was just larger than the outside diameter of the ferrule – and then tighten the screws just enough to make contact with the rubber bushings & take out the excess play. You do not want to over tighten them. The housing is supposed to have some flex on the rubber bushings to isolate the bulb/filament from the bike’s vibration.
FWIW, While it would have been possible to do this with a screw-holding screwdriver, tweezers, a steady hand and a lot of patience... the easier way (and it is easy) is to just take the license plate/fender support bracket off & get it out of your way.
~~ Live Like You're Dying ~~