XS11 Carb Sync [Video]

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  • 3Phase
    XS-XJ Super Guru
    • May 2008
    • 5529
    • Simi Valley, CA

    #1

    XS11 Carb Sync [Video]

    LarryM and I used three cameras to create a carb sync video. Larry spent two days editing the final video to use picture-in-picture showing the vacuum gauges and the external tachometer.


    Sync
    -- Scott
    _____

    2004 ST1300A: No name... yet
    1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
    1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
    1979 XS1100SF: "Bush" W.I.P.
    1979 XS1100F: parts
    2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.
  • Rickrod3
    XSive Maximus
    • Jun 2009
    • 721
    • Oakland, New Jersey

    #2
    You guy's make it look easy
    Nice Vid

    Rick
    XS1100F TKAT fork brace Stock suspension. Vetter Fairing. Pingel Petcocks. Geezer voltage regulator
    http://s910.photobucket.com/albums/a...t=DSCF3026.jpg
    650SF
    http://s910.photobucket.com/albums/a...t=DSCF2647.jpg
    XS1100SG Project bike
    http://s910.photobucket.com/albums/a...t=DSCF3034.jpg

    Comment

    • GARTHXS
      XS-XJ Guru
      • Nov 2007
      • 1631
      • Seattle

      #3
      So you finally synced it and you are showing off. Nice work and I really need an external tach
      91 kwaka kz1000p
      Stock


      ( Insert clever quote here )

      Comment

      • 3Phase
        XS-XJ Super Guru
        • May 2008
        • 5529
        • Simi Valley, CA

        #4
        Thanks, guys, it really is easy. It takes less than three minutes unless the carbs are really way out of adjustment.

        You can spend a lot of time playing around and second-guessing so I just open and close each screw to find the settings for mechanical sync, then do the same for the mixture screws.

        When you close the mixture screw to far it goes lean and the engine slows down; too far open and it goes rich and the engine lopes. The tach isn't really necessary. I didn't use it but it's there for those that like to watch gauges.
        -- Scott
        _____

        2004 ST1300A: No name... yet
        1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
        1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
        1979 XS1100SF: "Bush" W.I.P.
        1979 XS1100F: parts
        2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.

        Comment

        • CaptonZap
          XS-XJ Guru
          • Jun 2010
          • 1748
          • Denver

          #5
          Originally posted by 3Phase

          When you close the mixture screw to far it goes lean and the engine slows down; too far open and it goes rich and the engine lopes. The tach isn't really necessary. I didn't use it but it's there for those that like to watch gauges.
          How far back from lean do you set yours? CZ

          Comment

          • 3Phase
            XS-XJ Super Guru
            • May 2008
            • 5529
            • Simi Valley, CA

            #6
            Originally posted by CaptonZap
            How far back from lean do you set yours? CZ
            The same amount from rich but the other direction.

            Seriously: about 1/8th to 1/4 turn CCW from lean, depends on how it idles.
            -- Scott
            _____

            2004 ST1300A: No name... yet
            1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
            1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
            1979 XS1100SF: "Bush" W.I.P.
            1979 XS1100F: parts
            2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.

            Comment

            • soccer4m
              XSive Maximus
              • Jul 2002
              • 694
              • san diego

              #7
              nice work

              Nice video, just needs a few closeups, not to be picky, but beginners might want to see how to hook up the gauges with the tubing to the nipples, which screws{close up} to turn- hard to see any detail, etc. Its good to see others using the simplest gauges for synching, I use mine- exactly the same as the video, available from jcwhitney for around 50.00. Roll on,,,,,,,,,,,M
              mike
              1982 xj1100 maxim
              1981 venture bagger
              1999 Kawi Nomad 1500 greenie
              1959 wife

              Comment

              • natemoen
                Master of XSology
                • May 2010
                • 8640
                • Fargo

                #8
                Maybe also for beginners, calibration of the gauges.
                Nathan
                KD9ARL

                μολὼν λαβέ

                1978 XS1100E
                K&N Filter
                #45 pilot Jet, #137.5 Main Jet
                OEM Exhaust
                ATK Fork Brace
                LED Dash lights
                Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                Green Monster Coils
                SS Brake Lines
                Vision 550 Auto Tensioner

                In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                Theodore Roosevelt

                Comment

                • 3Phase
                  XS-XJ Super Guru
                  • May 2008
                  • 5529
                  • Simi Valley, CA

                  #9
                  Mike, I suppose it could have been done with a series of videos but that would quickly become tedious and pedantic. In the end we decided without prejudice that if someone cannot correctly connect four vacuum lines to four gauges and turn the correct screws to make the adjustments the bike should be taken to someone that knows what they're doing and have them do the work.

                  We did take some establishing shots showing the screws and vacuum lines in detail but it was too intrusive. It's not complicated and shouldn't be time-consuming; much less than five minutes if the engine is working correctly. It took more time to adjust the cheap plastic metering valves to stabilize the needles on the gauges than it did to do the actual sync. In a nutshell: if it takes more than a couple of minutes or the adjustments don't seem to work then something is wrong and synchronizing the carbs is not the answer.

                  The idea for the video was to make one relatively small clip showing the process in realtime that even people on dialup would be able to watch without tying up the computer. Also, it would have taken Larry four days instead of two days to do the final editing! Of course the trash truck came by just as we started the video (no bike should sound like that!) but it didn't turn out too bad even with the background noise.

                  This time around and the reason I was doing the carb sync in the first place was because the engine started popping and backfiring during deceleration. It turned out that the pickup coil plug connector at the TCI was loose and the coils were dropping spark at random times. In this instance the old truism, "90% of all carburetor problems are electrical!" applied in spades and I dove into the carbs for no reason... except to make a video.


                  Setting XS1100 Base Ignition Timing
                  -- Scott
                  _____

                  2004 ST1300A: No name... yet
                  1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
                  1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
                  1979 XS1100SF: "Bush" W.I.P.
                  1979 XS1100F: parts
                  2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.

                  Comment

                  • GARTHXS
                    XS-XJ Guru
                    • Nov 2007
                    • 1631
                    • Seattle

                    #10
                    Funny you should say that in the video "its a little retarded" I hope. You are talking about the timing! Lol
                    91 kwaka kz1000p
                    Stock


                    ( Insert clever quote here )

                    Comment

                    • 3Phase
                      XS-XJ Super Guru
                      • May 2008
                      • 5529
                      • Simi Valley, CA

                      #11
                      Originally posted by natemoen
                      Maybe also for beginners, calibration of the gauges.
                      Here you go, Nate!


                      Check vacuum gauge accuracy




                      Adjust a vacuum gauge to reduce needle flutter



                      Originally posted by GARTHXS
                      I hope. You are talking about the timing! Lol
                      <thump chest with edge of one hand>
                      What are you talking about, Garth, of course it's just the timing!
                      </thump>
                      -- Scott
                      _____

                      2004 ST1300A: No name... yet
                      1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
                      1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
                      1979 XS1100SF: "Bush" W.I.P.
                      1979 XS1100F: parts
                      2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.

                      Comment

                      • Larrym
                        XS-XJ Guru
                        • Oct 2008
                        • 1310
                        • Tucson

                        #12
                        Publish or Perish...

                        Originally posted by 3Phase
                        Also, it would have taken Larry four days instead of two days to do the final editing!
                        Uh...That's a big problem I have: The editing is never "Final". As long as I have the raw video I keep on Fussing wit'it.

                        Thankfully, Simi Valley is close to Hollywood so Scott knows what to do:

                        Grab the video from my filthy mitts and publish it before I RUIN it.

                        ( A Natural Producer he is....)

                        Comment

                        • 3Phase
                          XS-XJ Super Guru
                          • May 2008
                          • 5529
                          • Simi Valley, CA

                          #13
                          LMAO! Larry, you did great with the video/editing and you have way more patience than I do; taught me a thing or two about planning a video, then the actual shooting and editing.

                          FWIW it rained again today so you didn't miss anything and the storm didn't follow you when you left; no ride and no video for Rockedyne.
                          -- Scott
                          _____

                          2004 ST1300A: No name... yet
                          1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
                          1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
                          1979 XS1100SF: "Bush" W.I.P.
                          1979 XS1100F: parts
                          2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.

                          Comment

                          • Larrym
                            XS-XJ Guru
                            • Oct 2008
                            • 1310
                            • Tucson

                            #14
                            The Fourth Wall....

                            No Rain here in Az.

                            Will be unloading the bike and making that vid of the XS deploy/capture system.

                            Translation: Walk the bike down the ramps and then drive it back up for the "audience".

                            Keep practicing the Rock-a-Dyne run: I'll try not to wobble or "lose the line" as I follow you but there's no guarantee I'll be up to the standard of someone who's had as much track time as you...

                            Comment

                            • natemoen
                              Master of XSology
                              • May 2010
                              • 8640
                              • Fargo

                              #15
                              Originally posted by Larrym
                              Will be unloading the bike and making that vid of the XS deploy/capture system.
                              Thought you were developing an XS tow bike like those jap tow bikes
                              Nathan
                              KD9ARL

                              μολὼν λαβέ

                              1978 XS1100E
                              K&N Filter
                              #45 pilot Jet, #137.5 Main Jet
                              OEM Exhaust
                              ATK Fork Brace
                              LED Dash lights
                              Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                              Green Monster Coils
                              SS Brake Lines
                              Vision 550 Auto Tensioner

                              In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                              Theodore Roosevelt

                              Comment

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