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  • Pickup coil line

    On my 80 SG the vacuum line coming out out the pickup coil goes to the carb boot closest to the pickup coil.Correct? The octopus line goes to the next carb body.It has been that way for 18 plus years.Is that correct?I thought i read a thread telling me different.I dont have the stock airbox.Replaced that with K&N individual filters aound 18 years ago.
    1980 XS1100 SG
    Inline fuel filters
    New wires in old coils-outer spark plugs
    160 mph speedometer mod
    Kerker Exhaust
    xschop K & N air filter setup
    Dynojet Recalibration kit
    1999 Kawasaki ZRX1100
    1997 Jeep Cherokee 4.5"lift installed

  • #2
    NO

    vacuum line coming out out the pickup coil goes to the carb boot closest to the pickup coil.Correct?
    This one goes on #2 carb body, not the boot.
    Vac line for fuel should not make a difference what boot it's on but mine are on #2 carb boot. All other boots are capped off.


    mro

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    • #3
      I need a picture if you can.I have always ran it like this.
      1980 XS1100 SG
      Inline fuel filters
      New wires in old coils-outer spark plugs
      160 mph speedometer mod
      Kerker Exhaust
      xschop K & N air filter setup
      Dynojet Recalibration kit
      1999 Kawasaki ZRX1100
      1997 Jeep Cherokee 4.5"lift installed

      Comment


      • #4
        That vac line from the timing cover goes to the front left side of carb #2. That's front left when your siting on the bike. There is a copper tube about 1/2 an inch long sticking out of carb # 2 at that location. You can't miss it... unless a PO stuck a vac cap on it.
        Rob
        KEEP THE RUBBER SIDE DOWN

        1978 XS1100E Modified
        1978 XS500E
        1979 XS1100F Restored
        1980 XS1100 SG
        1981 Suzuki GS1100
        1983 Suzuki GS750S Katana
        1983 Honda CB900 Custom

        Comment


        • #5
          carb/boot pic


          hose that is curving over/thru fuel vac line..... is connected from vac advance to carb body.

          mro
          Last edited by mro; 06-16-2007, 04:48 PM.

          Comment


          • #6
            labels




            mro

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            • #7
              Thank you, mine was different.Would that change anything?Bike runs fine the way it is.Pics help out alot!
              1980 XS1100 SG
              Inline fuel filters
              New wires in old coils-outer spark plugs
              160 mph speedometer mod
              Kerker Exhaust
              xschop K & N air filter setup
              Dynojet Recalibration kit
              1999 Kawasaki ZRX1100
              1997 Jeep Cherokee 4.5"lift installed

              Comment


              • #8
                mro, does your camera actually not have auto-focus or where you simply swaying when you took that pic

                Comment


                • #9
                  Would that change anything

                  The carb body port for the vac advance restricts and dampens the vacuum pulses from the cylinder.

                  Should you wish to see the difference, pull the left cover off the engine and see what it's doing now, then switch hose to carb body.

                  Should realize a little better fuel economy and smoother running engine. With that said, I have the vacuum port plugged on my hot rod XS and it runs very well at all RPM including idle.


                  mro

                  Comment


                  • #10
                    hey pggg

                    What's "auto-focus"

                    Daughter #2 fuba'red my camera and she got this new one.
                    The verdict is still out whether it's me or the camera that has problems. (Noooo....this is not an invitation for you to give me $h1t, even if deserved )


                    mro

                    Comment


                    • #11
                      MRO I put the vacuum line where you said it goes.I pulled the choke out and it warmed up rather quickly, but i had to hit the gas a couple of times in order for bike to rev.Could that be because i had a tee fitting in between the lines?
                      1980 XS1100 SG
                      Inline fuel filters
                      New wires in old coils-outer spark plugs
                      160 mph speedometer mod
                      Kerker Exhaust
                      xschop K & N air filter setup
                      Dynojet Recalibration kit
                      1999 Kawasaki ZRX1100
                      1997 Jeep Cherokee 4.5"lift installed

                      Comment


                      • #12
                        tee fitting in between the lines?

                        Use no fittings on vac advance line.
                        Also if you are using original vac line, check it's integrity.
                        Look for any cracks etc.. (can go bad right where it enters engine cover too)
                        Original vac/fuel lines and the caps on carb boots can be a problem that is not always noticeable without specifically checking them.


                        mro

                        Comment


                        • #13
                          Would do the
                          "carb cleaner spray on intake boots check for vac leaks"
                          too.
                          Be sure to spray where boot mounts to head. Had one of mine that would not seal properly so instead of a gasket put some non-hardening gasket sealer on em. Has worked OK now for last year and a half.

                          Doing the easy checks/tests first to eliminate them from the possible problem list. Helps narrow down trouble shooting and it's good to know what condition things are in.


                          mro

                          Comment


                          • #14
                            MRO,Thanks for the info.I took off the old line and will need to replace vacuum line because it is not long enough.Just by chance do you know what size vacuum line it is?
                            1980 XS1100 SG
                            Inline fuel filters
                            New wires in old coils-outer spark plugs
                            160 mph speedometer mod
                            Kerker Exhaust
                            xschop K & N air filter setup
                            Dynojet Recalibration kit
                            1999 Kawasaki ZRX1100
                            1997 Jeep Cherokee 4.5"lift installed

                            Comment


                            • #15
                              All hoses for the vacuum are 3/16.
                              81 SH Something Special
                              81 frame, 80 tank and side covers, 79 tail light and carbs, 78 engine, 750 final drive mod, Geezer rec/reg, 140 mains, LH wheels


                              79 SF MEAUQABEAUXS
                              81SH Nor'eas tah (Old Red)
                              80 LG Black Magic
                              78 E Standard Practice


                              James 3:17

                              If I can make at least one person smile, or pee their pants a little, or maybe spit out their drink; then my day is not wasted.

                              “Alis Volat Propriis”

                              Yamaha XS 1100 Classic
                              For those on FB

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