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  • Few questions

    So the Pilot jets came yesterday from Partszilla and they don't have any holes like the ones in my SG do. They look actually shorter than the current ones. Still having the issues that the #4 pipe doesn't get hot as the others. #4 pipe gets hot on choke then doesn't maintain the heat. Since I got popping mostly out of # 4 carb could the air jets on the front of the carb be clogged? can they be removed? I have never removed them before. Many years ago I had a shop around 1988 install a Dynojet recalibration kit in the carbs. Should the pilot jets be different then? The stock pilot jets are 42.5. I will look what is in there now.
    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
    My guess is that if Dynojets where put in it they'd be different than stock. How much different, who knows but my best guess is it wouldn't play well with the other three carbs if it where returned to stock jets.
    1980 XS1100G

    I'm selling good clean hay. If you want something that's already passed through the horse, that comes a little cheaper.

    The quickest reply on a motorcycle repair forum comes when you post the wrong answer to your own question.

    Comment


    • #3
      Stock pilot jets should have 6 holes in the shaft like this. With a tiny hole in the end.
      https://www.mikesxs.net/200-3500-to-...ries-jets.html

      Not 8 holes like this.
      https://www.mikesxs.net/pilot-jet-vm...125-ebc-2.html

      I have no idea what a dynojet should have.
      79 F full cruiser, stainless brake lines, spade fuses, Accel coils, modded air box w/larger velocity stacks, 750 FD.
      79 SF parts bike.

      Comment


      • #4
        The jets I got from Partszilla have no holes in them.
        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


        • #5
          Have you run a cylinder compression check? I'm thinking the valve shims on the #4 might be tight. To state the obvious, Did you carefully inspect the intake manifold for cracks or leaks. Are the clamps tight?
          '80 XS1100LG Midnight Special
          Looks like an '82 Maxim, Fuel Injected
          '82 XJ1100J, Fuel Injected
          Stan Hutchison

          Comment


          • #6
            The Dynojet kit has all the jets except the pilot jet which should be the 6 hole genuine Mikuni. There was a discussion some time ago about the no side hole pilot jet and IIRC, it worked just fine in place of the 6 hole.
            2H7 (78)
            2H7 (79)
            3H3

            Comment


            • #7
              I also remember the older discussion about the side holes.

              I also remember that the side holes didn't seem to do anything... and it was OK if there were no side holes.

              I just know the pilot jet size in the K&L kit I bought were wrong and they looked like this (thanks red bandit):
              https://www.mikesxs.net/pilot-jet-vm...125-ebc-2.html
              -Mike
              _________
              '79 XS1100SF 20k miles
              '80 XS1100SG 42k miles
              '81 XS1100H Venturer 35k miles
              '79 XS750SF 20k miles
              '85 Honda V65 Magna ~7k miles
              '84 Honda V65 Magna 48k miles (parts bike)
              '86 Yamaha VMAX 7k miles

              Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65

              Comment


              • #8
                I had a cylinder running cold (not firing). It was the spark plug lead (wire) / cap. You need to check this item. Stan H.
                '80 XS1100LG Midnight Special
                Looks like an '82 Maxim, Fuel Injected
                '82 XJ1100J, Fuel Injected
                Stan Hutchison

                Comment


                • #9
                  I think that TC solved the pilot jet bleed hole mystery back when he was sawing carb bodies in half with his band saw...good info for anyone who has never seen it, good refresher for those who have.

                  https://xs11.club/forum/idle-talk-fo...y-of-the-carbs



                  Billy

                  1982 XJ1100, Ceramic Coated Headers, Raptor ACCT, Barnett Clutch Springs, Dremmel Fix, TC's Fuse Block, De-Linked S/S Brake Lines, 850 Final Drive, Yahman's YICS Eliminator, Pods, stock jets

                  Comment


                  • #10
                    The nozzle end of the 6 hole pilot jet (BS type) and the 8 hole (VM type) are different and so is the jet hole size...


                    Click image for larger version

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                    2H7 (78)
                    2H7 (79)
                    3H3

                    Comment


                    • #11
                      So today took everything out of #4 carb-Idle mixture screw-tip are good, emulsion tube cleaned and wiped down and air blown through holes, Pilot jet cleaned out and holes blown through, main jet cleaned and holes blown through, rubber diaphragm not ripped, and needle wiped down. When I took the pilot jet out, I used a q-tip to clean out that area. Air jet cleaned out. Float height set to 23 mm.-all passages cleaned out.
                      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
                        How about the rest of the carb body? The best way to make sure you've got the carbs thoroughly clean is to soak them in a chem dip such as Berrymans Carb Dip or Gunk. I've had some success in boiling them in a 50/50 mix of water and Pinesol.
                        1980 XS1100G

                        I'm selling good clean hay. If you want something that's already passed through the horse, that comes a little cheaper.

                        The quickest reply on a motorcycle repair forum comes when you post the wrong answer to your own question.

                        Comment


                        • #13
                          I have no way of boiling them. I will install them hopefully this weekend.
                          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


                          • #14
                            If you cannot boil them, at least use the B12 Chemtool spay can and tube to verify all of the carb is clean. I spray into every passage and look for it to exit. Wear safety glasses!
                            Ray Matteis
                            KE6NHG
                            XS1100 E '78 (winter project)
                            XS1100 SF Bob Jones worked on it!

                            Comment


                            • #15
                              I have been using the Gumout jet spray carb cleaner.
                              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

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