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how long should the vent hoses be?

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    #1

    how long should the vent hoses be?

    I am putting the carbs for my 82 GL 1100 GL back together tomorrow and I thought I might just replace the vent hoses...The ones that are on them now, are not long enough to hang down the back of the air box...What length are they normally? Should they hang down as far as the battery vent hose? or does it even matter? the ones that are on there now are, 16 inches or 40.64 cm.
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    #2
    should hang 1 inch below the bottom of the oil pan.
    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.

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      #3
      Thanks Chuck, I'll go get some more hose.

      Comment

        #4
        Originally posted by chuck hahn View Post
        should hang 1 inch below the bottom of the oil pan.
        What???

        On that, and similar, bikes, I have never even seen them reach the bottom of the airbox.

        They should terminate in relatively calm air, not the rush that would be under the oil pan.

        If you have a retainer loop on the back of the right side of the air box, route them both through it,
        but you will need to have the left hose a couple inches longer than the right one.

        .
        sigpic
        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
        #2 son: 1980 GS1000G
        Family Portrait
        Siblings and Spouses
        Mom's first ride
        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
        (Click on my username in the upper-left corner for e-mail info.)

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          #5
          Ok, that make sense. I couldn't see why they weren't longer, and I have seen other photos and they didn't look that long.

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            #6
            Make sure the overflows route to a position such that if they began to dump fuel, it won't wind up on the hot exhaust or the rear tire.
            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

              #7
              Originally posted by Nessism View Post
              Make sure the overflows route to a position such that if they began to dump fuel, it won't wind up on the hot exhaust or the rear tire.
              Would be nice, but the BS carbs on his 1100GL do not have overflows.

              I have only seen overflow tubes on the VM carbs on a GS.

              .
              sigpic
              mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
              hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
              #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
              #2 son: 1980 GS1000G
              Family Portrait
              Siblings and Spouses
              Mom's first ride
              Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
              (Click on my username in the upper-left corner for e-mail info.)

              Comment

                #8
                My BS34's have vent hose's that effectively work as over flows. Are the 1100G bikes different?
                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

                  #9
                  Well, the 1100GL has BS34s, too, so they are probably the same.

                  On the VM carbs, there is a tube up the middle of the float bowl that sits just above the normal fuel level and will act very nicely as an overflow preventer. On the BS carbs, fuel has to get quite a bit above "normal" level to get to the vent tubes. By then, you will have fuel flowing quite freely down the carb throat into the cylinder.

                  .
                  sigpic
                  mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                  hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                  #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                  #2 son: 1980 GS1000G
                  Family Portrait
                  Siblings and Spouses
                  Mom's first ride
                  Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                  (Click on my username in the upper-left corner for e-mail info.)

                  Comment

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