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I have a 2012 sportster 48 and only getting 23mi to the gallon should i be getting more then that it has a 2.3 penut tank and no work done to the bike?
My last Sportster was so long ago I don't remember the mileage but I'm sure it was well into the 30's. And that was with a 4 speed. You could have a mechanical problem, or maybe you just can't lay off the throttle. At least you're under warranty. You'll get some responses from members who have some current experience with the 48 and that will give you a better idea.
And welcome to the forum.
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