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  #11  
Old 18th September 2017
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I got the digital speedo with analog tach. it has the fuel gage on it. it works much better.
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  #12  
Old 18th September 2017
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Hex that's weird, you haven't played with the tank mounting or changed the way the bike sits too much have you?

Quote:
Originally Posted by sportsterdoc View Post
The Bonneville was the only EFI bike I've had. The low fuel light was very predictable.
I still reset the trip odometer every fill-up.
To be honest I can't really think about a single EFI bike I've owned where the low fuel light was inconsistent.

My V7 came on WAY EARLY at first, but while replacing the fuel filter I moved the fuel level sensor and it changed from 3.5G to 4.0G (which is much better on a bike that can use up to 5.0something of it's 5.5G capacity). Now it comes on at or after 200 miles.
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  #13  
Old 19th September 2017
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No I haven't. Every thing sets as it should. Since I got the digital speedo and put in a new fuel sender it is working much better.
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  #14  
Old 19th September 2017
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Default Same here

Quote:
Originally Posted by hexnut View Post
I got the digital speedo with analog tach. it has the fuel gage on it. it works much better.
I had the same issue as mentioned at the start of the thread.
New bike, trying to get a feeling for MPG.
The owners manual says the light comes on when 'less than a gallon' is left.
Once I filled it and added 2.5 gal. Another time 2.7.
I asked about it at the dealership. Got a 'hum' sort of reply.

I wanted an analog tach anyway so opted to go the same route as hexnut.
It will be installed at the 1000 mi service.
Hope I get the same results.

Forgot to mention I have a 4.5 gal tank on the 2017 XL1200C

Last edited by JRRadtke; 19th September 2017 at 16:05.. Reason: Added information
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  #15  
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Quote:
Originally Posted by JRRadtke View Post
I had the same issue as mentioned at the start of the thread.
New bike, trying to get a feeling for MPG.
The owners manual says the light comes on when 'less than a gallon' is left.
Once I filled it and added 2.5 gal. Another time 2.7.
Well, 2.5 or 2.7 is a little different than 2.0 vs 2.8 no?

I would think 2.5 or 2.7 could be the difference between a long incline or not? Or a lot of lean to the right and not much to the left for a while.

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  #16  
Old 19th September 2017
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I don't know that leaning makes any difference (it might, just never noticed it), but going up a steepish hill certainly makes 'it' think the fuel level is lower than it is.
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  #17  
Old 18th October 2020
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I need to get me one of those little cans. On my ‘09 Iron, the light will come on between 20 and 50 miles after a fill up. I get terrible mileage, sometimes, then other times in the 50s per gallon range. Haven’t had it long enough or had enough serious detective time to figure it out. First shocks, then an FP3, then a DK 828 for my ham can. The FP3 should show me the problem.

Ran out of gas on a run down to Columbia once. 90 mile trip with 20 on the odo (trip meter). A really nice lady stopped then went to her house for her lawnmower can. 93 octane no ethanol gas. There are some really great bikers out there. She stopped because she had a little Yamaha and was in the same predicament. Paying it forward. I talk too much. Happy Sunday.

Oh, I was saying... My fuel light sucks and is an arbitrary and capricious piece of crap.
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Last edited by Iron Chuck; 18th October 2020 at 15:36.. Reason: It was the tripmeter, not the odometer.
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  #18  
Old 18th October 2020
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Here's the Sportsterpedia page on the Fuel Pump - with info about the Low Fuel Light:
http://sportsterpedia.com/doku.php/t..._fuel_pump_efi

You probably have the original style float...


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  #19  
Old 18th October 2020
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Quote:
Originally Posted by Iron Chuck View Post
I need to get me one of those little cans. On my ‘09 Iron, the light will come on between 20 and 50 miles after a fill up. I get terrible mileage, sometimes, then other times in the 50s per gallon range. Haven’t had it long enough or had enough serious detective time to figure it out. First shocks, then an FP3, then a DK 828 for my ham can. The FP3 should show me the problem.
What makes you think FP3 shows you anything useful? It cannot detect kids from the hood stealing your gas
Either way,it is not really a tool to examine information,it does not give any. Better look for Power Vision,if you are keen on investigating.

With same 3.3 gal tank as yours I am getting low fuel light after 110-115 miles, totally empty after another 45 to 50. That is highway,70-80 MPH. Mixed with town traffic, about 10 % worse, start/stop traffic 20% increase in fuel consumption.
{Checked with jerrycan strapped to sissy bar )
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  #20  
Old 18th October 2020
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Damn, the upgraded float is $80 before shipping. That is BS for something that should cost $20. Mine was a little flaky when I got it. Noticed it would come on 70 miles after a fill up and only take about 1.7 gallons. Now it just comes on whenever.
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