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  • #1

    Valve clearences

    While I had the head off Pathfinder I was doing the valve adjustment thing. The closest manual was the Clymers so I opened it to check specifications. I thought it was for sure wrong because it said the intake side was to be 0.0004 - 0.0016 in or (0.0010 - 0.022 mm) and exhaust was 0.0010 - 0.022 in or (0.025 - 0.055 mm)

    Went for the Haynes and it said intake was 0.006 - 0.008 in or (0.16 - 0.20 mm) and exhaust was 0.008 - 0.010 in or (0.21 - 0.25 mm) I don't know where Clymers got those nuimbers, but they're obviously wrong....
    You can't stay young forever, but you can be immature for the rest of your life...

    '78E "Pathfinder" Show bike...
    Lovingly restored by Dave Delzell
    Drilled airbox
    Tkat fork brace
    Hardly mufflers
    late model carbs
    Newer style fuses
    Oil pressure guage
    Custom security system
    Stainless braid brake lines
    Tags: None
  • #2
    My clymer has the same numbers as your haynes.
    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

    • #3
      My Clymers

      Chapter 4, page 56 my Clymers has an engine specifications page which gives the specifications I mentioned. Clymers manual M411, Yamaha XS1100 1978 - 1981
      You can't stay young forever, but you can be immature for the rest of your life...

      '78E "Pathfinder" Show bike...
      Lovingly restored by Dave Delzell
      Drilled airbox
      Tkat fork brace
      Hardly mufflers
      late model carbs
      Newer style fuses
      Oil pressure guage
      Custom security system
      Stainless braid brake lines

      Comment

      • #4
        Yup, my Clymer's says the same thing as yours, planedick. It shows shows an extra zero in the specs on page 56. However, it does show the right amounts in the pad selection procedure on page 46.
        Ken Talbot

        Comment

        • #5
          I guess mine is the same on that page, BUT turn back to page 44, there is where its going through the procedure and it has the other numbers.
          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

          • #6
            Which is even more interesting since the specs are not the same for all 4 years, but are different between the early and late style head.
            Cy

            1980 XS1100G (Brutus) w/81H Engine
            Duplicolor Mirage Paint Job (Purple/Green)
            Vetter Windjammer IV
            Vetter hard bags & Trunk
            OEM Luggage Rack
            Jardine Spaghetti 4-2 exhaust system
            Spade Fuse Box
            Turn Signal Auto Cancel Mod
            750 FD Mod
            TC Spin on Oil Filter Adapter (temp removed)
            XJ1100 Front Footpegs
            XJ1100 Shocks

            I was always taught to respect my elders, but it keeps getting harder to find one.

            Comment

            • #7
              Oh the plot thickens!
              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

              • #8
                Proceedure

                Well, I don't need to follow the proceedure 'cause I've done it before and I really did know the correct clearences, but I just thought I would check to be sure as I really like to do it right the first time. If you compare the two other references you give on pages 44 and 46 you will see that they are different from each other as well.
                You can't stay young forever, but you can be immature for the rest of your life...

                '78E "Pathfinder" Show bike...
                Lovingly restored by Dave Delzell
                Drilled airbox
                Tkat fork brace
                Hardly mufflers
                late model carbs
                Newer style fuses
                Oil pressure guage
                Custom security system
                Stainless braid brake lines

                Comment

                • #9
                  Yeah I guess I remember looking at the numbers on page 46 and thinking something was weird. But there is that not there that says the numbers are for example purposes only so I ignored any numbers on pare 46.
                  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

                  • #10
                    I wonder why there isnt a late part in the back of the clymer manual that says the clearances for the later model systems.
                    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

                    • #11
                      In my Clymers manual, there is chapter 12 which gives all the updated info for the 80-81 model years.
                      Life is what happens while your planning everything else!

                      When your work speaks for itself, don't interrupt.

                      81 XS1100 Special - Humpty Dumpty
                      80 XS1100 Special - Project Resurrection


                      Previously owned
                      93 GSX600F
                      80 XS1100 Special - Ruby
                      81 XS1100 Special
                      81 CB750 C
                      80 CB750 C
                      78 XS750

                      Comment

                      • #12
                        Originally posted by DGXSER View Post
                        In my Clymers manual, there is chapter 12 which gives all the updated info for the 80-81 model years.
                        Yeah mine has that too but I glanced through it quick and didnt see anything about different valve clearances.
                        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

                        • #13
                          On mine at least it is in there. You have ot find the section on valve adjustment. Chapter 12 is not subdivided into the 11 other sections per say. More than one section may even be on the same page. But if you find the valve clearnace check procedure part, it clarifies the smaller inlet valve clearance on the later models.
                          Life is what happens while your planning everything else!

                          When your work speaks for itself, don't interrupt.

                          81 XS1100 Special - Humpty Dumpty
                          80 XS1100 Special - Project Resurrection


                          Previously owned
                          93 GSX600F
                          80 XS1100 Special - Ruby
                          81 XS1100 Special
                          81 CB750 C
                          80 CB750 C
                          78 XS750

                          Comment

                          • #14
                            may bad, I looked in the engine section and not in the periodic maintenance section.
                            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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