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  • fuel tap question

    the low fuel light on my '80 xs1100 special comes on at about 125 miles. anybody know how much more fuel is in the tank before i must go to "reserve"? can't find any info in the factory manual. thanks

  • #2
    If that thing is working properly, you're getting great fuel economy. IIRC, the light should come on when there is about 0.6 gal remaining in the tank, or reserve capacity. It comes on a bit before that. Mine usually comes on between 90 and 110 miles.
    Marty (in Mississippi)
    XS1100SG
    XS650SK
    XS650SH
    XS650G
    XS6502F
    XS650E

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    • #3
      Roughly about 3/4 gallon or less.

      Easy way to find out is to fill up as soon as possible after the light comes on. Subtract the amount you put in from tge total capacity and that is your answer.
      Nathan
      KD9ARL

      μολὼν λαβέ

      1978 XS1100E
      K&N Filter
      #45 pilot Jet, #137.5 Main Jet
      OEM Exhaust
      ATK Fork Brace
      LED Dash lights
      Ammeter, Oil Pressure, Oil Temp, and Volt Meters

      Green Monster Coils
      SS Brake Lines
      Vision 550 Auto Tensioner

      In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

      Theodore Roosevelt

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      • #4
        Originally posted by jetmechmarty View Post
        If that thing is working properly, you're getting great fuel economy.
        No kidding! With my normal super-short commutes (1.3mi each way), mine comes on at about 85 miles. Even when I'm on a long highway trip, it usually comes on right around 100 miles. I've never run it out or fuel, so I don't know exactly how far it will go, but I have gone at least another 15 miles on it without running out.
        1980 XS850SG - Sold
        1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
        Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
        Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

        Whether you think you can, or you think you cannot - You're right.
        -H. Ford

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        • #5
          I think wiht the age of these sensors they are all coming on at different actual fuel levels. I know on mine I have run out without it coming on, and I have had it come on as I am running out before. running out on ON that is, I still have reserve. I do not count on reserve getting me more than 10-15 miles at best. I typically look at reserve as running on fumes and GET GAS NOW!!! I have pushed this bike before, do not want to do it again!
          Life is what happens while your planning everything else!

          When your work speaks for itself, don't interrupt.

          81 XS1100 Special - Humpty Dumpty
          80 XS1100 Special - Project Resurrection


          Previously owned
          93 GSX600F
          80 XS1100 Special - Ruby
          81 XS1100 Special
          81 CB750 C
          80 CB750 C
          78 XS750

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          • #6
            thanks for the input. i've had low fuel lights before, and "reserve" fuel taps before, but never both on the same bike. seems kinda redundant. regardless, i'll be filling up when the light comes on. i DO NOT want to push this thing. way to heavy. and besides it's embarassing pushing a japanese bike down the road. last (and only) time it happened a harley guy stopped but i told him my fitness coach had me do it twice a week

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            • #7
              Originally posted by 650mark View Post
              - - - i've had low fuel lights before, and "reserve" fuel taps before, but never both on the same bike. seems kinda redundant. - - -
              Hi Mark,
              redundancy is good. Ol' red-eye can be real helpful if Mr Forgetful left his gas taps switched to reserve.
              Or if the gas tap filters fall off to lay in the bottom of the tank putting the bike permanently on reserve and running on unfiltered gas.
              Fred Hill, S'toon
              XS11SG with Spirit of America sidecar
              "The Flying Pumpkin"

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              • #8
                Originally posted by fredintoon View Post
                Hi Mark,
                redundancy is good. Ol' red-eye can be real helpful if Mr Forgetful left his gas taps switched to reserve.
                Or if the gas tap filters fall off to lay in the bottom of the tank putting the bike permanently on reserve and running on unfiltered gas.
                Not to hi jack the thread, but has anyone found a way to keep the filters in place after they have loosened up and fallen out?
                CZ

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                • #9
                  Originally posted by CaptonZap View Post
                  Not to hi jack the thread, but has anyone found a way to keep the filters in place after they have loosened up and fallen out?
                  CZ
                  I used some 'fuel tank repair epoxy' to glue mine in; that stuff will take the fuel exposure without going bad...
                  Fast, Cheap, Reliable... Pick any two

                  '78E original owner - resto project
                  '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                  '82 XJ rebuild project
                  '80SG restified, red SOLD
                  '79F parts...
                  '81H more parts...

                  Other current bikes:
                  '93 XL1200 Anniversary Sportster 85RWHP
                  '86 XL883/1200 Chopper
                  '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                  Cage: '13 Mustang GT/CS with a few 'custom' touches
                  Yep, can't leave nuthin' alone...

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                  • #10
                    Originally posted by crazy steve View Post
                    I used some 'fuel tank repair epoxy' to glue mine in; that stuff will take the fuel exposure without going bad...
                    Good idea, Steve.
                    I wonder if that stuff could be used to rebuild the float posts that are broken in the carbs. Are you talking about the putty like stuff that smears on the outside of the tank?
                    Any update on the SS bolt status?
                    Are you going to the British bike show at the LeMay museum?
                    http://http://www.lemaymuseum.org/events.php?eid=871

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                    • #11
                      I just installed the filters in my Special tank two nights ago. They were loose and wouldn't stay in. So I carefully wrapped a little aluminum foil around the base of the filter and pressed the filters into the petcocks.They seem to fit tight now.
                      80 SG XS1100
                      14 Victory Cross Country

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                      • #12
                        Originally posted by tarzan View Post
                        I just installed the filters in my Special tank two nights ago. They were loose and wouldn't stay in. So I carefully wrapped a little aluminum foil around the base of the filter and pressed the filters into the petcocks.They seem to fit tight now.
                        Thanks Rick, I like that idea better than epoxy. In fact, I was thinking about a drilled and tapped hole in the post, with a fender washer and machine screw to hold the filter in.
                        I'll look at it tomorrow and decide.

                        CZ

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