Exhaust type

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  • motorhead13
    New
    • Jun 2025
    • 8

    #1

    Exhaust type

    Quick question, does anyone know please if the XS1100 1978 model originall had 2 exhausts on either side rather than all 4 on the right?

    The project bike I've got has all 4 on the right but the down pipes are so low they'd get smashed to bits on the big speed bumps where I live, so wondered if it should have 2 exhausts on either side connected in the middle as I've seen? The exhaust on it isn't great but reluctant to buy something new that's all 4 on one side in case its just as low.

    Any advice or opinion appreciated.
  • Schming
    XS-XJ Guru
    • Jul 2009
    • 2100
    • Pittsburgh,PA

    #2
    Hello, All XS1100 & the XJ1100 came from the manufacturer with 4 into 2 exhaust systems, four downpipes, a balance crossover pipe then a single muffler on each side.
    1980 XS1100G "Dolly G" Full Dresser (with a coat of many colors )
    1979 XS1100SF (stock-euro mods planned)
    1984 XV700L Virago (to be hot-modded)
    1983 XJ750MK Midnight Maxim (semi-restored DD)
    1977 XS650D ( patiently awaiting resto)

    Sometimes it takes a whole tank of gas before you can think straight.

    Comment

    • jetmechmarty
      Master of XSology
      • Nov 2003
      • 8069
      • Coldwater, Mississippi

      #3
      It sounds like you have a Mac aftermarket exhaust. All XS11 bikes came with four into two exhaust systems. Four into two joined under and towards the front of the engine. There is a crossover in the middle.

      Jardine and Mac made 4 into 2 systems, but no more. Only four into one is available now and maybe only one manufacturer. Mac is no longer in business, AFAIK.
      Marty (in Mississippi)
      XS1100SG
      XS650SK
      XS650SH
      XS650G
      XS6502F
      XS650E

      Comment

      • Schming
        XS-XJ Guru
        • Jul 2009
        • 2100
        • Pittsburgh,PA

        #4
        Sounds like you have a 4 into 1 setup. A pic would help us sort out your exhaust properly. Stock systems, in good shape, are rare but can be had.
        1980 XS1100G "Dolly G" Full Dresser (with a coat of many colors )
        1979 XS1100SF (stock-euro mods planned)
        1984 XV700L Virago (to be hot-modded)
        1983 XJ750MK Midnight Maxim (semi-restored DD)
        1977 XS650D ( patiently awaiting resto)

        Sometimes it takes a whole tank of gas before you can think straight.

        Comment

        • DEEBS11
          XS-XJ Guru
          • Feb 2023
          • 2025
          • Connecticut

          #5
          I can't seem to load up jpg. pictures today (of stock/Mac pipes).....

          Comment

          • Radioguylogs
            XS-XJ Guru
            • Nov 2012
            • 2148
            • Presque Isle, MI

            #6
            Originally posted by DEEBS11
            I can't seem to load up jpg. pictures today (of stock/Mac pipes).....
            I tried to load a picture of the stock pipes yesterday and was not sucessful.
            -Mike
            _________
            '79 XS1100SF 20k miles
            '80 XS1100SG 44k miles
            '81 XS1100H Venturer 35k miles
            '79 XS750SF 17k miles
            '85 Honda V65 Magna ~7k miles
            '84 Honda V65 Magna 48k miles (parts bike)
            '86 Yamaha VMAX 9k miles

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

            Comment

            • DEEBS11
              XS-XJ Guru
              • Feb 2023
              • 2025
              • Connecticut

              #7
              Stock.....


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              Comment

              • DEEBS11
                XS-XJ Guru
                • Feb 2023
                • 2025
                • Connecticut

                #8
                MAC made 2 versions. 4 into 2 (which I run on my bike). Great oil filter and cam chain tensioner access.

                Click image for larger version  Name:	2.jpg Views:	0 Size:	173.3 KB ID:	891314 Click image for larger version  Name:	5.b.jpg Views:	0 Size:	166.8 KB ID:	891315 Click image for larger version  Name:	3.jpg Views:	0 Size:	159.3 KB ID:	891316
                Last edited by DEEBS11; Today, 12:24 AM.

                Comment

                • DEEBS11
                  XS-XJ Guru
                  • Feb 2023
                  • 2025
                  • Connecticut

                  #9
                  And the 4 into 1 that has been discussed here.



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                  Comment

                  • DEEBS11
                    XS-XJ Guru
                    • Feb 2023
                    • 2025
                    • Connecticut

                    #10
                    These days your best bet is a stainless system from Delkevic. Very good quality. No corrosion.


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                    Last edited by DEEBS11; Today, 12:32 AM.

                    Comment

                    • DEEBS11
                      XS-XJ Guru
                      • Feb 2023
                      • 2025
                      • Connecticut

                      #11
                      The Spaghetti. Very rare pipe.


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                      Comment

                      • Radioguylogs
                        XS-XJ Guru
                        • Nov 2012
                        • 2148
                        • Presque Isle, MI

                        #12
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                        I stumbled across an NOS Jardine spaghetti.
                        -Mike
                        _________
                        '79 XS1100SF 20k miles
                        '80 XS1100SG 44k miles
                        '81 XS1100H Venturer 35k miles
                        '79 XS750SF 17k miles
                        '85 Honda V65 Magna ~7k miles
                        '84 Honda V65 Magna 48k miles (parts bike)
                        '86 Yamaha VMAX 9k miles

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

                        Comment

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