Cruiserbob makes a good point. Before you start adjusting your carb, get an accurate reading with Miles vs Gallons.
I got 47.8mpg riding two up and full load on the rack and saddlebags, and riding with full gear on (helmets, jackets and boots).

I use dyna-beads in the tires and have them aired up with Nitrogen, plus I like to use the Shell gas that's nitrogen enriched, it does get better mileage than others. I use seafoam, 1oz per gallon about every 3rd tank full. I'm running synthetic oil (Mobil 1 full synthetic).

I was getting upper 30's to a low 40 MPG when I first bought the bike, but now it's gone up quite a bit.

I'm not taking anything away from what's been told to you by the others, I'm just saying that there are a lot of things that you can do to improve your MPG's. BTW, I like to roll the throttle a lot~!