Thats funny because thats is what I have two of them, carb'd 06 Americas
. Before I did any mods to them I got an average of 45 mpg. using premium, I always use premium.
After the first modifications in which I removed the snorkel put in uni filter, installed 130 jets, and installed open exhaust. I got about 43 mpg, but I was pretty lean. So I opened her back up and put in thruxton needles with 1mm shims then I got terrible about 39 mpg, then I was way rich. So I drilled out the bottom of the airbox still to rich and the fuel mileage suffered. Now I have taken the shims out. I am getting pretty close to 43 mpgs now which takes me about 140 miles. Untill I have to switch to reserve. Then I find a station close by, I dont risk it as I have run out of gas on the highway at night
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The absolute best I ever got. I was Just tooling around town and on some old lake roads was 50 mpgs. That was a one time only affair though
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I almost forgot I ride like I am trying to out escape the end of the world that has a dramatic effect on fuel mileage
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