bumpd muffler = vibration
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Stage I
Joined: Aug 2012
Posts: 1
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From: north royalton, oh
bumpd muffler = vibration
I have an '06 Road King Classic, 16k miles. I was on a road trip about 300 miles from home and dropped off a curb at about 3mph, the rear suspension compressed and the very tip of my slash cut muffler hit the curb. Got on the freeway and when I hit 70mph I thought my eyeballs were going to vibrate out of my head! I couldn't see at all. I pulled over and could see that the muffler was shoved up into the saddlebag support. One of the more seasoned Harley riders said that the exhaust system was putting a strain on the engine mounts, that's what caused the vibration. I removed the bag and jumped on the support to get everything back in place. I looked everything over when I got home and the rear fender has a slight twist to the right. The right side muffler doesn't "hang" in the rear support, it actually is tight up against the bottom of the bag frame. The vibration still seems excessive at highway speeds. Any suggestions as to my next step? I have thought of totally replacing the exhaust system, not sure if I want to spend the money without knowing if that's the problem.
I still can't believe that dropping off a curb could cause this much of an issue!
I still can't believe that dropping off a curb could cause this much of an issue!
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
The exhaust system is stout, but when 700lbs shoves it into a solid object, it will move.
I don't really know what to suggest at this moment, but I know from experience that if you don't do something soon, the bike will make choices for you. Your header will likely crack at the mounting points.
Beary
I don't really know what to suggest at this moment, but I know from experience that if you don't do something soon, the bike will make choices for you. Your header will likely crack at the mounting points.
Beary
Last edited by beary; Aug 10, 2012 at 09:32 AM.
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
if its a slip on muffler, loosen everything up so that you can move it all back into place, and then tighten it up again.
like beary said, do nothing, and the bike will do it for you, unfortunately, it won't be good.
oh, and stop curb hopping. this is a touring bike, not a trials bike
like beary said, do nothing, and the bike will do it for you, unfortunately, it won't be good.
oh, and stop curb hopping. this is a touring bike, not a trials bike
Road Master
Joined: May 2006
Posts: 1,229
Likes: 20
From: Greater St Louis, MO
Loosen the clamp on the muffler and the fender strut hardware and try to get things back to their neutral position. As stated stress and vibration is going to break something. If your fender is out of whack the support tube (53422-97) off the fender strut could be broken. You have to move or remove the chrome covers to see it. I had mine break where the support bracket (90720-79c) connected to the support tube allowing the fender to get slightly into the tire.
Last edited by dougbk; Aug 10, 2012 at 09:23 AM. Reason: grammar
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