I ride an RTR 160 (2011), done 6500 kms. All free services have been completed (last one was in July), and I checked the mileage recently. It is only 31 kmpl (did this with a really long sample, ie. full tank to reserve)
I do 75% city riding (Bangalore), the rest being longer trips on weekends.

What are the things to check for, just to make sure the low mileage isn't due to any faults on the bike itself? If everything checks out and it is simply due to riding conditions, then I'm ok with it.