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Fuel Leaking from Tank overflow hose

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    Fuel Leaking from Tank overflow hose

    All. I have owned a 1981 GS850GL for about a week. Long enough to change the oil and ride it about 70 miles. Over the weekend I noticed a tiny fuel leak coming out of what appears to be the tank overflow vent (rubber hose pointed down, runs from the right side of the tank, underneath the seat and is currently pointed down). The tank does not appear to be over filled, and I didn't have this problem until I moved the gas tank around and filled it up. It's showing about half a tank now and that seems odd. Might be leaking about 4 drops a minute.

    Is this line line supposed to be pointed straight down?

    Anyone help me with this? Thanks.

    #2
    Likely a leak from fuel sender unit.
    Drain and remove tank
    check the sender for leaks.
    1983 GS 550 LD
    2009 BMW K1300s

    Comment


      #3
      Its probably the sender unit seals going bad.

      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment


        #4
        Thanks. And the line should be pointed down correct? I should also mention my petcock valve appears to function normally and it's not running off the outside of the line. Rather coming from the line internally.

        Comment


          #5
          where in OK are you?? Im in Norman and if your close I would be glad to help you.
          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

          Comment


            #6
            How would you go about checking it for leaks ?

            Comment


              #7
              Altus. Lol. But I can drive towards you sometime. I have a thousand questions. Doing a cafe build and I'm sure I'll have to rejet carbs at some point.

              Comment


                #8
                If its wet on the underside of the tank around the sender then thats the problem. Take off the outer cover with the 4 8MM head bolts and see if its wet in there. If the seal between the tank and the fuel sender unit is bad it will be wet there. Replace with new OEM seals.
                MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                Comment


                  #9
                  That is exactly the problem. I can feel under there and visually inspect it and it's definitely wet. will replace! Thanks!

                  Comment


                    #10
                    And do you know what this bike gets for mileage....roughly?

                    Comment

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