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1979 XS1100 SF startup- barn bike

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  • 1979 XS1100 SF startup- barn bike

    I bought a barn bike rolling chassis and motor to play with, the motor allegedly was in very good shape. As I got into it the motor did seem to be in great shape. So I have carefully gone through it in preparation for a startup. Been though the engine, fuel, and electrical systems and all looks good for a startup. This bike is missing the exhaust system.

    Can I do a startup without the exhaust headers/pipes? It will be loud for my little garage, but is it mechanically safe?
    1979 XS1100 SF stock
    1979 XS1100 F Bagger w/G Motor
    1978 XS1100 2H9 (Next startup)
    1979 XS 750 SF

  • #2
    Yes. It WILL be loud, and it won't idle very well.

    Also make sure there is nothing flammable in front of the engine!

    Be very careful not to put your hand anywhere near the exhaust ports (of course)

    All this will tell you is that it will fire up. If you can turn the lights off, for a moment, you will also be able to see if all 4 are firing and whether each cylinder is relatively lean/rich compared to the others.

    Don't gas yourself. make sure the grarage door is open.
    Nice day, if it doesn't rain...

    '05 ST1300
    '83 502/502 Monte Carlo for sale/trade

    Comment


    • #3
      I'd say you may want to roll it outside. The noise inside a garage may prove very painful!!
      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


      • #4
        If you do want to try and start it that way,
        dont let it run for to long, its not good on the exhaust valves.
        pete


        new owner of
        08 gen2 hayabusa


        former owner
        1981 xs1100 RH (aus) (5N5)
        zrx carbs
        18mm float height
        145 main jets
        38 pilots
        slide needle shimmed .5mm washer
        fitted with v/stax and uni pod filters

        [url]http://www.youtube.com/watch?v=3pA8dwxmAVA&feature=mfu_in_order&list=UL[/url]

        Comment


        • #5
          do it, and take a video!

          i want to hear these bikes with no pipes

          it has to be ridiculous!
          1980 XS1100SG - almost done

          Comment


          • #6
            That's not anything I would attempt.
            And I'm accustomed to doing all kinds of stupid sh!t!
            Joe


            78XS1100

            Comment


            • #7
              yes it can be started.

              I've done it...

              and it's accualy disapointing on how quite it is...

              it's much much louder with the manifold on and the mufflers off.

              like the man said don't run it too long that way because it IS hard on the valve to run it more then 60 seconds at a crack.

              it will only tell you that the bike runs or doesn't run.
              to properly tune the carbs, you have to have an exhaust system on it.

              please remember that if you remove all backpressure you will decrease performance of this bike. these bikes had "tuned" exhaust systems from the factory, that proved to be excelent for engine performance.

              that and.... beer is alway's the answer......what was the question?
              1979 XS1100SF Special.78 E motor/carbs, Jardine 4-2 exhaust, XS Green coils, Corbin seat, S.S. Brake lines, Hard cases, Heated grips.

              2012 FJR1300 Gen 2. Heli bar risers, R-gaza crash bars, mccruise cruise control.

              (2)2008 WR250R. Because kids outgrew others.

              2007 Suzuki V-Strom 1000. (Just added 2024) pre-crashed.

              1975 Kawasaki S1 250. My first bike. Still have it. NO I'm not selling it!!

              Most bike problems are caused by a loose nut connecting the handlebars and the seat!!

              Comment


              • #8
                And when you do start it I would do it on a Sunday morning very early.
                79 XS1100SF
                78 YZ400E
                81 SR500
                79 RM250
                77 YZ400D
                05 RM250
                78 CR 250 Husky w/TT500 motor

                Comment


                • #9
                  as has been said already. don't run it long because the exhaust valves won't like it (the rapid cool down when shut off is the problem and the hotter they are the greater the risk of warpage), but sunday morning early sounds like a realy good idea, I'd kinda like to be there to watch that.
                  Alias Larry R in Kelso WA

                  When in dought, punch it.
                  XS1100LG Precious current
                  XS1100SF Ruby gone to a better home
                  KZ900B MIA stolen (ALL bike thieves MUST GET OFF THE PLANET more politically correct ???)

                  Comment


                  • #10
                    I've done it before just because............................

                    It's not that loud without pipes on it, as a matter of fact it sounds kinda like a 4 cyl lawnmower.

                    Follow all the advice given though if you do start it.

                    Comment


                    • #11
                      Thank-you all

                      So the consensus is on Sunday morning, beer in hand, for start-up purposes only – do not run long enough to get hot, video the performance, and this goes on the list of crazy stuff.

                      Thanks to all
                      1979 XS1100 SF stock
                      1979 XS1100 F Bagger w/G Motor
                      1978 XS1100 2H9 (Next startup)
                      1979 XS 750 SF

                      Comment


                      • #12
                        You got it!
                        Nice day, if it doesn't rain...

                        '05 ST1300
                        '83 502/502 Monte Carlo for sale/trade

                        Comment


                        • #13
                          Originally posted by Lettuceman View Post
                          So the consensus is on Sunday morning, beer in hand, for start-up purposes only – do not run long enough to get hot, video the performance, and this goes on the list of crazy stuff.

                          Thanks to all
                          Yup I did it on a Friday night, beer in hand, no video but neighbors over etc. From where I was standing working the throttle it was not so bad. APPARENTLY it was kind of loud everywhere else. I was informed of this for a few days afterwords from various neighbors who failed to attend the event
                          2-79 XS1100 SF
                          2-78 XS1100 E Best bike Ever
                          80 XS 1100 SG Big bore kit but not fully running yet.
                          Couple of more parts bikes of which 2 more will live!

                          Comment


                          • #14
                            Ftp

                            sunday morning??

                            i did a xj750 maxim carb tune-up at 3am....

                            the cops showed up at 430 after i was done tuning.

                            and i had a Factory exhaust system fully mounted on it.

                            my town sucks.

                            i use vac gauges so i can sync at all rpm ranges.

                            my neibors are going to be pissed when i do more tuning work on my 11
                            with the HD touring pipes on there. hee hee hee..... i think sunday at 6:01am
                            is the perfect time to carb tune and test fire bikes.
                            noise ordinace 10pm to 6am in my town..
                            1979 XS1100SF Special.78 E motor/carbs, Jardine 4-2 exhaust, XS Green coils, Corbin seat, S.S. Brake lines, Hard cases, Heated grips.

                            2012 FJR1300 Gen 2. Heli bar risers, R-gaza crash bars, mccruise cruise control.

                            (2)2008 WR250R. Because kids outgrew others.

                            2007 Suzuki V-Strom 1000. (Just added 2024) pre-crashed.

                            1975 Kawasaki S1 250. My first bike. Still have it. NO I'm not selling it!!

                            Most bike problems are caused by a loose nut connecting the handlebars and the seat!!

                            Comment


                            • #15
                              Ya cops have no sense of humor at 4:30a.m (no dounut shops open) go figure
                              Alias Larry R in Kelso WA

                              When in dought, punch it.
                              XS1100LG Precious current
                              XS1100SF Ruby gone to a better home
                              KZ900B MIA stolen (ALL bike thieves MUST GET OFF THE PLANET more politically correct ???)

                              Comment

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