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Dyna Switchback Vibration Fix

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  • Dyna Switchback Vibration Fix

    As most of you know the dyna switchback has a noticeable vibration around 2800 rpm's.. There is a harley bulletin out about it . Here is a link to that bulletin .. https://www.box.com/s/15d6d8edf75569ee6c4f . However the reviews have been minimal improvement .. After a lot of searching the internet and research , the problems seems to be in the exhaust setup .. Aftermarket exhaust seems to get rid of the vibrations . However at $500 to 1400 bucks , It is not an option for everyone .. Should this be a warranty issue .. YES . If you complain enough and take a copy of the service bulletin , you can get your dealership to address it but as I said the results were minimal in my research.

    But don't give up yet . Here is what I have done and the results were great. Virtually eliminated the vibration .

    First a little background on the bike setup
    I have the factory headers with the cat "drilled" , not removed yet . I have a vance and hines twin slash slip-on that I upgraded to at purchase . Just as a note , the vibration was still there with the slip on

    I am also running a gen 3 but that didn't help the vibration issue either ., But i do recommend it as an upgrade .

    The fix

    The problem is in the factory mount setup . Some of the aftermarket exhaust are
    replacing one of the mounts too.
    Before you do all that try this ..

    loosen the bolt on the slip on muffler and right behind the slip on is a mount bolt 1/2" socket will fit it remove this bolt . you will notice it is a slotted hole. then loosen the nut at the back of the exhaust almost all the way off. . Pull the slip on muffler back until the slot in the center mounting bolt is centered . now tightened the slip on muffler clamp .. Put some blue locktite on the center mount bolt and screw it in about halfway .. Do NOT tighten .. put some blue locktite on the rear mount stud and start the nut .. again this is 1/2" wrench Start the bike and tighten the rear mount bolt up snug turn off bike . Go to the center mount and tighten it down until it touches and back off one half of a turn . Let the locktite cure and you are ready to go ..

    The above procedure made a world of difference on my bike .. Hope it does on yours too

    Just as a note , I did not do anything that the service bulletin said to do because it was not fixing the issue .


    :D
    It Hard to be Sad When your Riding

    1996 Harley sportster 1200 C
    2012 Dyna Switchback Stage 1 , D&D fat cat exhaust

  • #2
    Great info Mark!
    OFFICIAL HERD MEMBER #83
    2014 FLHXS
    U.S. NAVY Veteran

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    • #3
      Originally posted by B-Man View Post
      Great info Mark!
      I was very impressed with the difference it made . Also you might want to save a copy of the service bulletin because someone else has that site and could take it down

      Click image for larger version

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      This is a pic of the bolt that needs to be left loose
      Last edited by Marknett; 12-01-2012, 06:09 PM.
      It Hard to be Sad When your Riding

      1996 Harley sportster 1200 C
      2012 Dyna Switchback Stage 1 , D&D fat cat exhaust

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      • #4
        Great point! So, besides the vibration issue.......how do you like the Switchback?
        OFFICIAL HERD MEMBER #83
        2014 FLHXS
        U.S. NAVY Veteran

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        • #5
          Originally posted by B-Man View Post
          Great point! So, besides the vibration issue.......how do you like the Switchback?
          I love my switchback .. great torque , plenty of power with that 103 and stage 1 and it looks sweet too

          Click image for larger version

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          It Hard to be Sad When your Riding

          1996 Harley sportster 1200 C
          2012 Dyna Switchback Stage 1 , D&D fat cat exhaust

          Comment


          • #6
            I test rode a Switchback when we were in Sturgis last August..........I liked it! You plannin' on doin' any engine work or gonna keep 'er stock?
            OFFICIAL HERD MEMBER #83
            2014 FLHXS
            U.S. NAVY Veteran

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            • #7
              nice looking bike, i really like the wheels.
              Crazy people don't know they're crazy, I know I'm crazy therefore I'm not crazy, isn't that crazy.....

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              • #8
                Originally posted by B-Man View Post
                I test rode a Switchback when we were in Sturgis last August..........I liked it! You plannin' on doin' any engine work or gonna keep 'er stock?
                Right now , gonna keep her stock but down the road ???
                It Hard to be Sad When your Riding

                1996 Harley sportster 1200 C
                2012 Dyna Switchback Stage 1 , D&D fat cat exhaust

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                • #9
                  Nice ride.........hopefully I'll get to see it in person one of these days!
                  OFFICIAL HERD MEMBER #83
                  2014 FLHXS
                  U.S. NAVY Veteran

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                  • #10
                    Good information - I had to make this a STICKY for others that may have the same issue!
                    .
                    2010 FLHX - Street Glide
                    HERD MEMBER #00003

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                    • #11
                      might wanna copy/paste the bulletin in case its taken down like mark said.
                      Crazy people don't know they're crazy, I know I'm crazy therefore I'm not crazy, isn't that crazy.....

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                      • #12
                        Originally posted by TheBoss View Post
                        Good information - I had to make this a STICKY for others that may have the same issue!
                        cool
                        It Hard to be Sad When your Riding

                        1996 Harley sportster 1200 C
                        2012 Dyna Switchback Stage 1 , D&D fat cat exhaust

                        Comment


                        • #13
                          Soooo,what made You thinking that what You did was going to be an improvement,juz curious is all.I`d a never thought that.
                          Ear Tag no. 00030

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                          • #14
                            I read up on what everyone was trying and what helped what didn't . The old wrenches or some of them say to start the bike and let the muffler find it's happy place and then tighten it up . So this is not my idea , just a combination of what was working. The results on my bike was great so I passed it on. When I first heard it was the exhaust , I shrugged it off but there was no denying that the aftermarket exhaust was changing or fixing the problem .The 103 on rubber mounts rocks hard in the frame and if you
                            lock it down with the exhaust , it just transfers it straight to the bike. It worked on my bike , I hope it helps someone else
                            Last edited by Marknett; 12-02-2012, 06:23 AM.
                            It Hard to be Sad When your Riding

                            1996 Harley sportster 1200 C
                            2012 Dyna Switchback Stage 1 , D&D fat cat exhaust

                            Comment


                            • #15
                              Mark, great thread!

                              As I have a much older 2000 Dyna, I'm no stranger to the generic Dyna engine vibration issue. I read the service bulletin with interest.

                              As this has specifically to do with the Switchback exhaust, and is a sticky, I won't comment, other than to say thanks for the link to the bulletin and it's info on the front isolator alteration. I'll add this to the stuff I have. My Superglide is "middle-aged" and I'm planning to replace front and rear isolators this winter, as well as the top motor mount and compensator link (Like a Heim joint) that was bent and repaired during my little misadventure last May.

                              I'll start a thread of my own on this when the time comes. There's a lot going on with the Dyna engine mounts. I can tell you that when you change up the exhaust components (I'm on my 3rd system) the signature of the engine vibration changes completely.

                              Thanks again!
                              PFFT PFFT PFFT PFFT PFFT

                              2001 FXDX Superglide Sport. More horses than a feller would want

                              Official HERD Member #00192

                              "What, me worry?" Alfred E. Neuman

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