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Old Apr 30, 2012 | 06:11 PM
  #11  
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Originally Posted by francisac
i ride 75-85 mph best i got a few weeks ago was 170 on a tank and when i refueled i put 4.7. Stock with just samson fishtails. fuel injected though
Just yesterday we did 180 miles and ran around 80mph most of the time. When I fueled up it took 4.6 gal, which came out to 39 per gallon. Typically around town/highway I get 40-41.
 
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Old Apr 30, 2012 | 06:16 PM
  #12  
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I gave up on watching my Mpg's I work the gears, ride it like I stole it & if I want to get any Mpg's I hit the cruise control. If your really wanting to get better mpg then it's time for a 6th gear.
 
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Old Apr 30, 2012 | 06:23 PM
  #13  
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Keep those RPM's at 2800 and below and your MPG's will increase.
 
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Old Apr 30, 2012 | 06:24 PM
  #14  
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and the miles on your bike?
 
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Old Apr 30, 2012 | 06:26 PM
  #15  
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Fuel quality? 10% Ethanol will hurt. I'm betting your running a bit rich. That's the kind of mileage my buddy gets with his 02 carbureted RK with a 106" S&S.
 
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Old Apr 30, 2012 | 08:26 PM
  #16  
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Originally Posted by Arizona
Yeah I'd say if you're trying to max your MPG's to keep the speeds at 65-70 mph and keep a steady hand - no up and down on the speeds - nice n smooth/steady.

On your start-ups take them smooth and easy, running up through the gears gently and that should give you maximum mileage.

You're at the low end of normal for these bikes. They usually are in the upper 30's and low 40's. Some individual bikes will run in the upper 40's. Riding style has alot to do with it of course. You're not running too rich? I assume you've checked all those things?
Im riding like you describe with the exception of speeding. I did have the mechanic check out the carb and make sure all was good. It was a bit rich and was adjusted.
 
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Old Apr 30, 2012 | 08:33 PM
  #17  
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Originally Posted by speakerfritz
and the miles on your bike?
26,000
 
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Old Apr 30, 2012 | 08:46 PM
  #18  
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Not sure what to say, sounds like you've covered the basics. Maybe someone else here will be able to suggest something.

I know for my current bike the winter fuel blends give me 2-3 mpg LESS than the summer blends. Just last week the summer blend must have come out, cuz my MPG's just went from a very consistent 36-37 mpg to 39-40 mpg on my daily commute here in So Cal (I log 137 miles a day, every day on my daily commute and keep a close eye on MPG's).

Now another thing I've noticed is that fuel blends in different parts of the country seem to vary in what MPG's they give. On big cross-country road trips i've gotten 42-45 mpg in some states and 50-51 mpg in other states on the same day, same driving conditions, same load on the bike, etc. The only variable was the region I was in and I suspect the fuel blends must vary from state to state and even vary in different parts of some states.

In your case you may have the "perfect storm" of lousy fuel blends where you live and a bike that just doesn't give as good a mileage as other similar bikes, etc.

Have you run Seafoam or a Fuel System cleaner through it, maybe that will clean out your system a bit since the bike is 10 yrs old. The fuel filter? How long since that was changed?

Good luck, hope you can get the MPG's up to more typical figures.
 

Last edited by Arizona; Apr 30, 2012 at 08:52 PM.
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Old Apr 30, 2012 | 08:51 PM
  #19  
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My 06 carb'd SG gets 32, but I'm rarely on the hiway it seems.

I have pipes and intake and tuned the carb myself, runs great possibly a bit rich......
 
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Old Apr 30, 2012 | 08:54 PM
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70 mph is the mpg line for me. Over 70 I get 35-38 under 70 I get 40-42. I've never seen 45 mpg in 15 years with 3 different Harley's.
 
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