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GS1000 tanks hoses "where do they go"

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    GS1000 tanks hoses "where do they go"

    So I have the manual for my 1978 GS1000 but it doesn't have any good pictures. So here's a picture of my tank:


    So blue hose is gas hose and goes to the center of the carbs I think?
    The other hose I believe is for vacuum? Where does that go?

    Also there looks like there's hose that comes off the gas gauge in the middle. Where does that go?

    Do these connection where my finger is need to be connected/closed off or just left as is?

    #2
    Vacuum hose goes to No3 carb (left to right facing forward). The take off's on No2 & No4 are for breather hoses that wrap over the top of the airbox.

    See below for the same arrangement on my 750




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      #3
      As Joes pics show. In your pics, the black is the fuel line that goes to the TEE between 2 and 3. The blue is the vacuum that goes to the brass nipple on 3. The other 2 are vents that get routed over the air box and down between the swing arm and frame area. Run the vent lines and then cut them about 1 inch LOWER than 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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        #4
        The outlet from the fuel gauge sender goes in to a long hose that drops down somewhere by the front of the swinging arm. It's there in case the sender leaks - you don't want petrol spewing over the top of a hit engine.
        79 GS1000S
        79 GS1000S (another one)
        80 GSX750
        80 GS550
        80 CB650 cafe racer
        75 PC50 - the one with OHV and pedals...
        75 TS100 - being ridden (suicidally) by my father

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          #5
          Originally posted by crackerman View Post
          ............ my 1978 GS1000


          .....
          Hey Folks:

          Why do 2 adjacent carbs have this port....?
          (I, myself, don't have any experience with any pre 80, nor any VM carb.....)

          .
          Last edited by Redman; 08-04-2015, 12:56 PM.

          Had 850G for 14 years. Now have GK since 2005.
          GK at IndyMotoGP Suzuki Display... ... GK on GSResources Page ... ... Euro Trash Ego Machine .. ..3 mo'cykls.... update 2 mocykl


          Comment


            #6
            Redman

            They look similar, but they are not. The #2 vents from the carb, the #3 has a port in the intake that creates vacuum. You can always tell a #3 carb by looking at the engine side
            1978 GS 1000 (since new)
            1979 GS 1000 (The Fridge, superbike replica project)
            1978 GS 1000 (parts)
            1981 GS 850 (anyone want a project?)
            1981 GPZ 550 (backroad screamer)
            1970 450 Mk IIID (THUMP!)
            2007 DRz 400S
            1999 ATK 490ES
            1994 DR 350SES

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