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What size is my fuel line??

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    What size is my fuel line??

    It's a dumb question, I suppose, but I really don't know as mine is pretty old and stretched out. I thought it was 5/16"...but that size wanted to leak. Is the standard size 1/4"? (By the way, I have a Pingel and my old line just plugged right in and never leaked.) Mahalo, guys!:-D
    1980 GS1100E, the latest of many.

    #2
    Originally posted by rockford View Post
    It's a dumb question, I suppose, but I really don't know as mine is pretty old and stretched out. I thought it was 5/16"...but that size wanted to leak. Is the standard size 1/4"? (By the way, I have a Pingel and my old line just plugged right in and never leaked.) Mahalo, guys!:-D
    What is a PINGEL

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      #3
      I use 5/16 fuel line.

      Pingel
      1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
      1985 GS1150ES stock with 85 Red E bodywork.

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        #4
        The stock fuel line on my 550's is a smig larger than 1/4". 5/16" automotive fuel line (Goodyear) fits loosely on the petcock nipple without a clamp on my bike. The factory line is thin wall, unlike automotive fuel line which has to hold pressure and is thicker, and the thinner line seems to fit better on the fuel Tee on my carbs.
        Ed

        To measure is to know.

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          #5
          5/16

          Interesting.... I've now discovered that 5/16 is not necessarily 5/16. I have two different fuel lines that are supposed to be 5/16...one is slightly less..and, one is slightly more. Probably both were made in China and that's the way it goes.

          I figured out that my Pingel (which is a 'spendy' high quality petcock) is labeled for a 5/16th line but my new, fancy polyurethane line still leaked. I put on a hose clamp but I've never, ever had to do that before.
          Last edited by rockford; 10-22-2007, 11:03 AM.
          1980 GS1100E, the latest of many.

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            #6
            *50 lines...

            Rockford, Mahalo!

            What is the size of the fuel line for the GS850?

            AG GL

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              #7
              Originally posted by AG GL View Post
              Rockford, Mahalo!

              What is the size of the fuel line for the GS850?

              AG GL
              I suppose it's the same but I'm not certain. In the morning, I'll cut an old one in the middle, measure it and let you know what I find. I'm pretty sure it's OEM and the middle won't be stretched out.
              1980 GS1100E, the latest of many.

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                #8
                Originally posted by AG GL View Post
                Rockford, Mahalo!

                What is the size of the fuel line for the GS850?

                AG GL
                5/16

                (It's actually 8mm, but 5/16 (7.94mm) fuel line is close enough here in the metrically retarded Land of Amerika.)

                It's common to have problems putting 1/4 inch (~ 6.3mm) fuel line on 6mm fittings. Just try a different brand of fuel line -- some are tighter than others.
                1983 GS850G, Cosmos Blue.
                2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
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                Comment


                  #9
                  Originally posted by bwringer View Post
                  5/16

                  (It's actually 8mm, but 5/16 (7.94mm) fuel line is close enough here in the metrically retarded Land of Amerika.)

                  It's common to have problems putting 1/4 inch (~ 6.3mm) fuel line on 6mm fittings. Just try a different brand of fuel line -- some are tighter than others.

                  The ID on the factory fuel line for my 550 is a little over 6mm.

                  On the parts fiche (for both the 550 and 850) it lists: "HOSE 6X10X600" which I think means 6mm ID, 10mm OD, 600mm length.

                  1/4" fuel line comes closer than 5/16". 5/16" will work, but it fits the nipple quite loosely and could leak, depending on the brand.
                  Ed

                  To measure is to know.

                  Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                  Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                  Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                  KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                  Comment


                    #10
                    Originally posted by Nessism View Post
                    The ID on the factory fuel line for my 550 is a little over 6mm.

                    On the parts fiche (for both the 550 and 850) it lists: "HOSE 6X10X600" which I think means 6mm ID, 10mm OD, 600mm length.

                    1/4" fuel line comes closer than 5/16". 5/16" will work, but it fits the nipple quite loosely and could leak, depending on the brand.
                    I measured a line that I'm almost positive is OEM and found exactly the same thing. (1/4 inch is 6.35MM)
                    1980 GS1100E, the latest of many.

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