Bagger Dual Exhaust on a Dyna

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Dec 12, 2012 | 10:06 PM

blackv03

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Joined: May 2006

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From: Gouverneur, New York

Bagger Dual Exhaust on a Dyna

I've only seen one picture of an old FXR with dual exhaust that exited on each side of the rear tire .. and I have to say it looks badass !!! has anyone else tried this on "newer" Dynas? I have an 03 Lowrider that I'd love to have true duals on. Someone out there must have tried this ... right??

Dec 12, 2012 | 11:27 PM

SURFOR Chop

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Joined: Apr 2007

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From: Seattle, WA

Forum member AFMM3 has adapted an '09 Touring exhaust to his Street Bob ...

There are a couple of hurdles that have to be cleared in order to do this modification ...

Although the motors are both "A" type (i.e., not counterbalanced like the "B" variant in Softail models) and therefore the exhaust ports are mirror images ... the mounting position/orientation of the motors is slightly different between the the Touring and Dyna models ... the Touring are rotated slightly forward with respect to the crank axis or it could also be expressed as the Dynas being rotated slightly to the aft ...

I adapted a Touring pipe (Paughco) ... and before modifying it, the pipe fit, but it angled down to the aft ... I took it to a muffler shop and asked them to bend it a few degrees more ... then had the rear pipe cut down about 3/4" ... got it to hang horizontal ...

Going with a dual exhaust with the crossover the big issue is how to support the muffler on the left side of the bike (well, both sides, actually) ... the Touring models support the mufflers on the saddlebag brackets and you can't really do that with the Dyna ...

Also, the Softail solution for supporting the dual mufflers doesn't really work since the Softails use the frame ... well, the Dyna motor is rubber mounted so you can't mount the exhaust from the frame on the Dyna or the vibration will beat it apart ...

Here's a photo of mine with non-dual ...

Here's a link to another thread where AFMM3's technique is detailed on pages 6 and 7 ...

https://www.hdforums.com/forum/dyna-...low-rider.html

Hope this helps ...

R/
'Chop

Dec 13, 2012 | 05:25 AM

AFMM3

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Joined: Apr 2010

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From: North Dakota

Vance and Hines does make a dual exhaust for the FLD that could be adapted possibly (anything is possible). Though at around $1,200 I have never heard of anyone purchasing it. As SURFOR Chop said, I made mine from a 2009 touring exhaust. In the first iteration I suspended the mufflers from my saddlebag supports but I was wearing out the rubber isolators too quickly (every 800 miles or so). My second configuration includes a support bracket that gives each muffler support from the motor and the saddlebags are not required. Here is a YouTube to hear what they sound like.

Last edited by AFMM3; Dec 13, 2012 at 05:26 AM. Reason: typo

Dec 13, 2012 | 07:59 AM

blueangel73

Grand HDF Member

Joined: Mar 2010

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From: South of Mordor

I have been trying to figure this out for awhile now. I have also been following Chop and AFMM3 for awhile with their progress. I will start watching this thread also to see if it goes anywhere. Good luck!

Dec 13, 2012 | 07:03 PM

AFMM3

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From: North Dakota

OK, I will make it even worse for you blueangel73, here is my father's 2005 Super Glide/70s FLH Clone. I am not sure if he finished yet but he is also doing dual exhaust. From what I remember, he told me that the fron down tube is the stock Dyna graphted to a Twin Cam 2005 FLHT right side exhaust. The left side exhaust pipe was from a Shovelhead FLH. I think he was down to working out the muffler bracketry when he got distracted by his Shovelheads. He will probably finish it up next month or so.