Vacuum advance frustration

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  • PlanetMobius
    XSive
    • May 2011
    • 15
    • Waukesha, Wisconsin
    #1

    Vacuum advance frustration

    Just picked up a 1980 XS11 Special. The previous owner said that he could never get it to run right. I took it home and cleaned the carbs and changed the plugs and did the basic stuff. I got it to start and it ran Ok but had a hesitation on the acceleration. Then I noticed that the vacuum hose to the timing advance was missing. I put a new one on but every time I connect it, the bike shuts off. what did the previous owner do and how do I undo it?
    Tags: None
    • jetmechmarty
      Master of XSology
      • Nov 2003
      • 7765
      • Coldwater, Mississippi
      #2
      Have you reset the timing? If not, you should start there. The factory service manual and/or the Clymer manual explain how to check the vacuum advance for proper function. You have the hose connected to the #2 carburetor?
      Marty (in Mississippi)
      XS1100SG
      XS650SK
      XS650SH
      XS650G
      XS6502F
      XS650E

        Comment

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

          The pick-up coil wires might be broken. If they are, when the timing plate advances and stretches the broken wires the engine will die because there's no signal to the TCI to fire the ignition coils.


          Pick-up Coil Wire Repair
          by Ken Talbot


          .
          -- 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

            • PlanetMobius
              XSive
              • May 2011
              • 15
              • Waukesha, Wisconsin
              #4
              I will check both those things. Thank you.

                Comment

                • BA80
                  Doctor of XSology
                  • Oct 2010
                  • 9980
                  • Tulsa, Ok
                  #5
                  +1 on what 3Phase posted.
                  Greg

                  Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                  ― Albert Einstein

                  80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                  The list changes.

                    Comment

                    • motoman
                      Master of XSology
                      • Aug 2005
                      • 8413
                      • Grand Junction, Colorado
                      #6
                      Originally posted by BA80
                      +1 on what 3Phase posted.
                      .......and if broken, that'll be internally(try to stretch wire EVERY inch).
                      Just for grins, I'm bettin' on the white wire, if any found broke internally.
                      81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

                        Comment

                        • BA80
                          Doctor of XSology
                          • Oct 2010
                          • 9980
                          • Tulsa, Ok
                          #7
                          Originally posted by motoman
                          .......and if broken, that'll be internally(try to stretch wire EVERY inch).
                          Just for grins, I'm bettin' on the white wire, if any found broke internally.
                          Ok, I'll take that bet. I'll take the orange wire for the win.

                          $100 .............oops forgot the decimal .........$1.00
                          Greg

                          Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                          ― Albert Einstein

                          80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                          The list changes.

                            Comment

                            • James England
                              XS-XJ Super Guru
                              • Oct 2010
                              • 3039
                              • North of England
                              #8
                              Originally posted by BA80
                              Ok, I'll take that bet. I'll take the orange wire for the win.

                              $100 .............oops forgot the decimal .........$1.00
                              I bet you a rear left wheel bearing against $20 it's the white........ Wanna take me up on it.....?
                              XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

                                Comment

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