Checked mine when I filled up today got 43 mpg bone stock 14 FXDB. I was testing fuel gage and thought I had it down pretty low. Fuel light was on and remaining miles indicator showed low range (under 10 miles I think ) but the bike still had a gallon in it ??? Just trying to get a feel for the true range of a tank of gas. I haven't been on any long runs yet

 

The fuel guage and light are useless, I think they are there for more of a decoration. On that note, I fill up around 160-170 miles, and usually have a gallon left in the tank. I ride my bike like I stole it, so Im sure I could stretch it out farther if I was lighter on the throttle.

My habit is..fill up, reset trip meter, ride, and fill up again around 160.

 

Yeah, that light is useless. First time I filled up after I got the bike, the guage was buried on empty and the light was on, with the "low mileage" warning. So I go to fill up and the tank only took about 2.5 gallons.

 

Too many things affect gas mileage. I get a combined 34. My rides are short, and I never get into sixth gear on the interstate. I shift @ 3500 rpms and ride @ around 28k to 32k. I warm the bike up to 125*. Running a PV tune. I have 2013 96 ci.

The Specs say a Dyna gets 42 combined. So, it would be really interesting to get details from those getting close to 50 mpg!

 

I have a 14 FXDB. Engine is stock, stock A/C, V&H Short Shots. I weigh *cough* 250lbs.

Over 23 fillups, my average is 39.53mog. Highest is 45, lowest is 35. Average fill up is 3.7gal, and the average miles between fillups is 150 (some were in the 140s, a couple were 170-180, but mostly 150-160)

Looks like I could probably stretch a tank out to 170, but I would rather stop and fill up than worry about making it to the next station.

Hope you get it worked out.

 

These last two posts are closer to what I'm getting. I don't know how some of these guys are getting around 45mpg?...I usually fill up at about 140-150 miles, bike usually takes about 4 gallons of gas. I can't be that heavy on the throttle, haha.

 

Yeah Rusty that mileage is a little low especially for a stock bike. I weigh a little on the north side of 250 and fueled up yesterday and got 43 mpg. I would agree with Jesse 81 you need a tune up. I would suggest a SEPST and dyno, you will love the way it performs and the mileage will be better and the engine runs cooler. Good luck.

 

My 2010 is all over the place, depending on how I'm riding, if I'm riding 2up, how much highway, etc. I've gotten as low as 30, and as high as 46. My average is about 40ish.

Chase

 

I have a 2009 Fxdc with V&H straight shot slip ons, other than that the bike is stock. On a recent trip to PA. I got 47 mpg. I am 230 lbs and ride conservatively most of the time. But I have rode this bike til nearly empty(210 miles)and filled it up,took 4.9 gallons. One thing i did notice, not sure if it really means anything but I fill up with the bike on the kickstand and notice that it took a little more gas at fill ups than sitting on the bike. Just throwing this out there. I run amsoil in engine, primary and tranny.

 

I have a stock 2010 SB. At first I was getting 43-46 mpg. Then I started riding my bike. Now I get 38-40 mpg. I regularly hit 100 mph