Fuel Gage Stuck on by 2010F650GS..."Little Help!" - BMW F800 Riders Forum & Registry



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  1. #1
    2010F650TWIN's Avatar
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    Put 120 miles on 'er last weekend, and the gas gage didn't move. Any suggestions? Common problem? Repair/replace/work-around?

    Thanks!
    Tom
    Burnsville, NC & St. Petersburg, FL
    2010 F650GS & 2015 R1200GS 

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  3. #2
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    I get to circa 130 miles before mine registers at half full. I usually get 200 miles from 14 litres of fuel.

  4. #3
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    Hi Tom: As Chrispeet mentioned and as you've probably already found out: The fuel gage ins't broken - it only shows what is in the bottom half of the tank (i.e. it won't show any change until you've burnt off the top half of your fuel). These bikes are really quite easy on fuel.

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  6. #4
    bmwroadsterca's Avatar
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    And here is the explanation.
    Click image for larger version. 

Name:	Tank cutaway.jpg 
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  7. #5
    2010F650TWIN's Avatar
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    Quote Originally Posted by bmwroadsterca View Post
    And here is the explanation.
    Click image for larger version. 

Name:	Tank cutaway.jpg 
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    Chrispeet, Greeg, bmwroadsterca,

    Thank you all, or ya'll if you're from NC, for your help on the sticking gas gage issue. I'll give it a good long ride this coming week, and see if the gage won't go down with the fuel level.

    Cheers!
    Tom
    Burnsville, NC & St. Petersburg, FL
    2010 F650GS & 2015 R1200GS 

  8. #6
    Richard230's Avatar
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    If I recall correctly, I think the fuel gauge of my F650GS starts to register after riding about 150 miles upon starting off with a full tank.
    Richard - Current bikes: 2016 BMW R1200RS, 2018 16.6 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2020 KTM 390 Duke, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

  9. #7
    Lag's Avatar
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    If it weren't for the manual or advise from previous owners it would be quite difficult to figure out what that fuel gage is doing,,.
    Kindah ridiculous in this day and age of smart gadgets and range finders & so on however, I will say its quite accurate at the bottom of the tank,,!!

    So far I've gotten as low as 58 Kilometers on the reserve,,,, has anyone seen more then that?

  10. #8
    Richard230's Avatar
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    Quote Originally Posted by Lag View Post
    If it weren't for the manual or advise from previous owners it would be quite difficult to figure out what that fuel gage is doing,,.
    Kindah ridiculous in this day and age of smart gadgets and range finders & so on however, I will say its quite accurate at the bottom of the tank,,!!

    So far I've gotten as low as 58 Kilometers on the reserve,,,, has anyone seen more then that?
    My reserve is about 1.3 US gallons, which should net me around 75 miles at a typical 60 mpg. Fortunately, I have never completely run out of gas, but I did put in 4.4 gallons one time.
    Richard - Current bikes: 2016 BMW R1200RS, 2018 16.6 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2020 KTM 390 Duke, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

  11. #9
    Lag's Avatar
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    Curious what your manual says for the 650?
    According to my manual,,,2015 F700GS,,. Perhaps they changed this when they went to the 700,,.

    16 liter usable fuel capacity = USG 4.227
    2.7 liter reserve = USG .713 @ 60mpg = 42.78Miles (I don't think I get 60 mph per USG)
    So looks like at 58 Kilometers on the counter I still had 10 k left assuming I get 60 mpg and you can use every drop of the stated reserve? I've always used 50 kilometers as the limit and have only gone over the once?

  12. #10
    Richard230's Avatar
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    Quote Originally Posted by Lag View Post
    Curious what your manual says for the 650?
    According to my manual,,,2015 F700GS,,. Perhaps they changed this when they went to the 700,,.

    16 liter usable fuel capacity = USG 4.227
    2.7 liter reserve = USG .713 @ 60mpg = 42.78Miles (I don't think I get 60 mph per USG)
    So looks like at 58 Kilometers on the counter I still had 10 k left assuming I get 60 mpg and you can use every drop of the stated reserve? I've always used 50 kilometers as the limit and have only gone over the once?

    The manual may be right, but so am I as I can fill my fuel tank above the bottom of the expansion tube to near the top of the tube. That can give you an additional liter of fuel or so in the tank. I will do that if I am on a trip and I know that the next gas station is located over 200 miles away like you might see in some out-of-the-way locations. Just don't do this if you plan to park your bike for more than a few minutes before continuing on your journey or the additional fuel may expand and overflow. My gas mileage ranges between 55-65 mpg, depending upon the speed that I am traveling. I once got 70 mph while traveling at 75 mph, but that was at high altitude in Nevada while using E0 fuel, instead of my usual E10 smog gas.
    Richard - Current bikes: 2016 BMW R1200RS, 2018 16.6 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2020 KTM 390 Duke, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

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