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  • Harley Pipe reducer

    I tried to install a set of Harley Dyna Glide mufflers but realized that I need to weld an adaptor to make it work. The Yamaha pipe is roughy 1.5" OD and the Harley muffler is approx 1.7" ID. I searched extensively but have not been able to find adaptors with 1.5" id on one end and with 1.75 OD on the other end. Anyone find one? Any other options for this install? Cheers, Doug
    81H Venture - hope to ride summer 2013
    79F Cafe Racer at Some Point;
    68 CB175 Sloper - Cafe Racer
    74 KZ400 - Restoration project nightmare
    62 BSA Super Rocket - In Pieces
    72 CB100 Super Sport - Not super or sporty but fun

  • #2
    Originally posted by mmatches1 View Post
    I tried to install a set of Harley Dyna Glide mufflers but realized that I need to weld an adaptor to make it work. The Yamaha pipe is roughy 1.5" OD and the Harley muffler is approx 1.7" ID. I searched extensively but have not been able to find adaptors with 1.5" id on one end and with 1.75 OD on the other end. Anyone find one? Any other options for this install? Cheers, Doug
    Hi Doug,
    the adapter should go outside the end of the existing exhaust and inside the Harley muffler but you may have to compromise that set-up according to what adapter sizes you can actually find.
    I had the good luck to find the adapters I needed in Canadian Tire's automotive exhaust pipe section.
    And Stainless Steel T-bolt hose clamps work better and look better than the usual worm drive hose clamps for holding the mufflers on.
    Fred Hill, S'toon
    XS11SG with Spirit of America sidecar
    "The Flying Pumpkin"

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    • #3
      A good muffler shop should be able to swell a piece of 1.5" for you.
      US Army 1986-1991

      1979 1100 Special (on the road after 16 years!)
      1983 GS300L (wifes ride)
      1985 Super Glide
      2012 Super Glide

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      • #4
        I would get the right size tube for the mufflers, and weld a 2" chunk of them to your headers. A lot of people have learned that the Harley mufflers come off at the wrong angle when just clamping them to the headers. Look in the Harley muffler thread.
        "The Hooligan" XJ1100, Virago Gauge Pods, Screaming Eagle Mufflers, K&N Filter, hand made rear fender, side covers, and solo seat, round bar conversion, small headlight, tail light, and cat eye turn signals, chip fuses, rewired the right way.

        Pics: http://s1236.photobucket.com/user/ya...?sort=6&page=1

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        • #5
          Originally posted by mmatches1 View Post
          I tried to install a set of Harley Dyna Glide mufflers but realized that I need to weld an adaptor to make it work. The Yamaha pipe is roughy 1.5" OD and the Harley muffler is approx 1.7" ID. I searched extensively but have not been able to find adaptors with 1.5" id on one end and with 1.75 OD on the other end. Anyone find one? Any other options for this install? Cheers, Doug
          Here's a site I'll be using in the near future:

          http://www.coneeng.com/motorcycle_components.html

          HTH
          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.

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          • #6
            I forgot that pipes can be expanded. I decided to take the bike to a local muffler guy tomorrow and find out what he can do. I have to learn how to weld one of these days. My brother has been a pipe fitter for over 20 years. The exhaust site just posted looks very interesting.
            81H Venture - hope to ride summer 2013
            79F Cafe Racer at Some Point;
            68 CB175 Sloper - Cafe Racer
            74 KZ400 - Restoration project nightmare
            62 BSA Super Rocket - In Pieces
            72 CB100 Super Sport - Not super or sporty but fun

            Comment


            • #7
              The muffler shop did a great job for $60. They modified a reducer and welded it at one end. I will post some photos if anyone is interested.
              81H Venture - hope to ride summer 2013
              79F Cafe Racer at Some Point;
              68 CB175 Sloper - Cafe Racer
              74 KZ400 - Restoration project nightmare
              62 BSA Super Rocket - In Pieces
              72 CB100 Super Sport - Not super or sporty but fun

              Comment


              • #8
                It didn't happen without photos.
                "The Hooligan" XJ1100, Virago Gauge Pods, Screaming Eagle Mufflers, K&N Filter, hand made rear fender, side covers, and solo seat, round bar conversion, small headlight, tail light, and cat eye turn signals, chip fuses, rewired the right way.

                Pics: http://s1236.photobucket.com/user/ya...?sort=6&page=1

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                • #9
                  Did you get it done in Drayton Valley? Still waiting for pictures. LOL
                  '79 XS11SF

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