Churping Exhaust
Road Warrior
Joined: Nov 2008
Posts: 1,595
Likes: 8
From: Vancouver Island British Colombia Canada
Another solution for you. Pop your mufflers off & stuff steel woll in the end that faces the front of the bike. You can use a fair amount without restricting flow too much. Bolt them back on & try it out. If it fixes your problem, start looking for "Stainless woll" like from a machine shop etc. Worked well on my 88 bagger!
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Cruiser
Joined: Dec 2009
Posts: 102
Likes: 0
From: Central Florida
Maybe something like steel wool ! I did notice the right side(front cly) has this honeycomb looking stuff toward the inlet side maybe just enough back pressure on that side to NOT chirp.This will only drive me crazy a little longer before I put the loud SE muffs back on.
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Cruiser
Joined: Dec 2009
Posts: 102
Likes: 0
From: Central Florida
Well,I gave into the chirp!I've tried everything I could...Today the screaming eagle pipes are back on with no chirp just louder than I care to have these days...So much for what I thought would be a inexpensive fix to loud pipes..82 degrees I guess I'll go ride it and remember back to how much I wanted the screamin-eagles to begin with.
Thanks to all for your suggestions!!
Thanks to all for your suggestions!!
Tourer
Joined: Feb 2009
Posts: 404
Likes: 0
From: L.A. (Lower Alabama)
I have beat myself on the head with this noise too. It is definitely related to muffler pressures and flow rates. With stock pipes and slightly modified baffles, no chirp, but I wanted a little louder sound. I have been through the Screaming Eagle I Slip Ons, Wild Pig Pipes, and Khrome Werks slip ons, and each of them has a flow velocity related chirping sound at about 2100 rpm and below. Roll the throttle on or off a little and it quits, but at a steady cruise it sounds, to quote somebody else, "like an old VW". It sounds so much like a ping that I think it must be a shock wave bouncing off a baffle or off the next subsequent wave in line as it reflects. As the wild pigs were the cheapest, I have done a lot of baffle modification to no avail whatsoever. A thousand dollars worth of mufflers, and none of the companies will help. All I get is "Nobody ever mentioned that before, it must be your bike." Or the answer I got from Khrome Werks, which was silence. So the parakeets have won. As good as these pipes all sound winding through the gears, I spend most of my time at a steady 60 mph and the tweets are about to make me nuts. So this weekend the Khrome Werks will join the others in the rafters, and the stock go back on. If anybody comes up with a fix for this, we would be forever in your debt. I finally got hold of Khrome Werks. They say the sound is airflow in the mufflers and is not uncommon on quiet high flow systems. It's there on loud high flow systems too, you just can't hear it. Their mufflers have very high quality and awesome midrange torque, but I have to do something about that noise. Their customer service lady says she has the same mufflers on hers with no noises, and says the engineers will work with me to fix the problem. We'll see.
Last edited by oldbiker771; Apr 1, 2010 at 07:12 PM. Reason: Contact with Manufacturer
Tourer
Joined: Feb 2006
Posts: 390
Likes: 1
From: Ozark, AL
I have Rush slip-on's on my '08 Ultra and have a little "chirp" at idle but it only seems to do it when the muffler is cold. I think it might be the baffles as it seems to be coming from inside the muffler. Once it gets hot the metal expands and the chirp goes away.
Road Warrior
Joined: Nov 2008
Posts: 1,595
Likes: 8
From: Vancouver Island British Colombia Canada
Am I ever glad I've been following this thread! I didn't know what you meant by chirping until now but I have had this problem for 2 years. looks like I have a new area to check. I thought it was my brakes, than my fairing, than my rear rotor but could never trace it!
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Road Master
Joined: Dec 2006
Posts: 1,200
Likes: 3
From: Simpsonville, SC
I have a 06' Ultra with V&H true dual head pipes that I had the SE mufflers on (not for street use mufflers).Anyway I wanted to change them over to something a little quieter after a lot of reading I took my OEM muffs and drilled out the plugs in them,using a 1 1/8 whole saw. Much better sound but awful chirping at idle and certain rpms.Did I just ruin my OEM muffs,or is there something to fix this chirping.Just couldnt justify spending a lot on new slip ons, got enough boxes of parts in the garage now.Thanks for any input.Mark
Tourer
Joined: Feb 2009
Posts: 404
Likes: 0
From: L.A. (Lower Alabama)
Well, I fixed mine. 90% anyway. I wanted true duals, but everybody wants $400 for just the head pipes. I learned about Fullsac and bought one of their $179 dual conversion kits. Comes with 2 plasma coated pipes, an exhaust gasket, and a mandrel to round out your pipes and get a good fit. About an hour to install if you stay off the beer and pay attention. Uses your old heat shields. Looks good, performs well, and 90% of that infernal chirping is gone, what's left is drowned out by valve train noise. This is obviously not the answer for everyone, as some folks already have duals and still have the chirp. But in my case there was certainly a connection between the y pipe and the noise. My 3 year search for the perfect sound and a little better performance is finally over. The *** dyno says good mid-range tq, decent hp at the top. I added 4 mph to the top end (98-102) without losing that low and mid-range snap we all love so much. All hail Fullsac!