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Catalytic Mufflers - 850 days old
The left side of the pic is the outlet end of the muffler, Both ends were removed because it was just easier to get it apart this way. The solid part at the right of the pic is the catalyst.
The new 09 bikes have the cat located in the forward pipe so slip on mufflers can be used and still retain the catalytic converter.
... Read more
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2,479 -
Jan 30th, 2010 06:18 PM
by fin_676 
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Muffler Squeaks - 775 days old
Many of the touring bikes at one time or another will experience a squeaking coming from the rear of the bike when hitting some bumps.You'll also see that there is some play in the rubber mount where the support bracket (muffler) can move up and down a bit, this is normal.
The length of the support bracket when properly installed is... Read more
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2,975 -
Mar 10th, 2009 11:05 PM
by 175mws
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Muffler Leaks - 377 days old
Some have posted about having a leak where the muffler joins the pipe area an could not figure out what to do to correct this. Here's a few Ideas to deal with this situation.
If you suspect an exhaust leak and are trying to locate it, this works pretty well.
Put on some heavy gloves and start the motor up.
Cover the ends of both... Read more
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1,997 -
Mar 8th, 2009 09:20 AM
by glider
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1,805 -
Jul 27th, 2007 10:03 AM
by glider
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True Dual Install - 439 days old
Posted by "Bud White"
OK i searched and read and read and read some more and decided i wanted Vance and Hines True Duals but was worried about bottom end.
Well i came across a Kit that turns the exhaust into a true duals and from a dyno run i saw and forgot to copy where it didn't lose any bottom end show 1 more foot pound of... Read more
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3,190 -
May 21st, 2009 03:52 PM
by Bud White
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Exhaust Buyers Guide - 308 days old
Four pages of exhaust info for those looking to change the exhaust.
Exhaust Buyer's Guide
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2,088 -
May 16th, 2009 11:30 AM
by glider
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Exhaust db's - 343 days old
As posted by DocSledge, this is an excellent post and give you an idea of the differences in volume with or without baffles with db readings
Measure sound pressure levels at 1 meter from source to get accurate reading. Probably should be more toward the back instead of just to the side. Done at idle (warm) and maybe 2500rpm.
Another... Read more
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1,682 -
Apr 11th, 2009 05:12 AM
by Hobbit
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Making Drag Pipes Work - 976 days old
Here's some interesting concepts on how to make drag pipes work with "Thunder monsters" from Big City Thunder. Back pressure or the lack of it is what causes the dip in torque on harley motors and here's a way to regain some of that lost power.
http://www.bigcitythunder.com/pages/product-fit.html
... Read more
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5,036 -
Mar 10th, 2009 05:01 AM
by Maddogdez
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Stock Mufflers On True Duals - 378 days old
It's been asked a few times about using the stock mufflers on a true dual setup on the harleys.Stock mufflers for the most part will not work on a true dual setup.
The key is in the construction of the muffler. Some mufflers you can look inside the shell front and rear and see if they are both constructed the same as far as the baffling... Read more
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609 -
Mar 7th, 2009 12:36 PM
by glider
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Exhaust Facts - 472 days old
Let's start with the basics. Without getting into a lesson in physics there are three factors that effect the performance and tuning of an exhaust system. Sonic pulse, thermal pulse, and exhaust gas velocity.
Sonic pulse. Think of this as a shock wave. This pulse travels through the exhaust and at the end of the pipe... Read more
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1,801 -
Jan 31st, 2009 02:49 PM
by Hobbit
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Baffle Braid - 431 days old
May be the answer to a few questions for a quieter exhaust without changing them.
You know about “no baffle” tickets! But you could not find curved baffles to fit inside your bent and twisted pipes.
Powerbraidz is a new flexible exhaust baffle that fits into curved or radius pipes like Grumpys, Martin Bros, Samson and a lot of other... Read more
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1,237 -
Jan 13th, 2009 11:13 AM
by glider
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Exhaust Pipe Wrapping - 690 days old
Many people use the exhaust wrapping for various reasons like looks or an attempt to keep the heat down in the pipe.
This wrapping is for race bikes as it promotes better flow through keeping the temps in the pipes up. It is however not good on other applications as it shortens the life of the pipes considerably, makes them brittle and... Read more
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2,006 -
Apr 30th, 2008 04:01 AM
by Hobbit
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02 Sensor Plugs - 730 days old
Some exhaust systems have the bung for the 02 sensors and the question comes up about what size and thread are they.
You can find plugs at NAPA stores, #35299 will work great to plug the bungs.
NAPA® Online
http://partimages2.genpt.com/partimages/151549.jpg
... Read more
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1,609 -
Mar 20th, 2008 08:17 AM
by glider
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06 Catalytic Mufflers - 815 days old
Here's a dyno chart showing the difference between the 06 catalytic mufflers and the 07 stock mufflers as far as power on the same bike.
Blue run is cats, red run is 07 stock mufflers
http://i149.photobucket.com/albums/s45/bills985/catmufflercomparer.jpg
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1,263 -
Jan 13th, 2008 08:13 AM
by Hobbit
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