Quiet Pipes

[Zukdriver]

Is there an after market exhaust that is qiuet? I really don't think I want aything louder than stock, but I would like let it breathe a bit better.

[1RAASTA]

Welcome ZUK, search stock exaust mods in this forum, some guys have drilled out their stock pipes. As for quiet replacments cant help you there, most guys are running v/h big shots or the h/k 3in bigs on their 1600s. Happy shopping.

[Sgt Mike]

Originally Posted by Zukdriver

Is there an after market exhaust that is qiuet? I really don't think I want aything louder than stock, but I would like let it breathe a bit better.

In most cases a less restrictive exhaust will also increase in sound volume. There may be a manufacturer that makes one that would meet you expectations but I haven't heard of one. Somebody will most likely chime in and advise you on this matter.

[Ken]

Check out the Vance & Hines 2:1 Pro Pipe. A nice throat to it, but not nearly as loud as most others.

[Phatboy]

Originally Posted by Sgt Mike

In most cases a less restrictive exhaust will also increase in sound volume. There may be a manufacturer that makes one that would meet you expectations but I haven't heard of one. Somebody will most likely chime in and advise you on this matter.

Well the options are to mod your stockers so they're less restrictive or mod the aftermarket pipes so that they are more restrictive. I chose the latter. They're still a lot louder than stock, but quiet enough for me.

[TBVulcan]

Phat, How did you like the sound of those HK 3" Big Straights before you modified them? I don't have a 1600 Classic, but I looked at a couple last night at my dealer. I will be buying one next spring most likely. Fell in love almost immediately! Not willing to take a big hit on my 800, plus getting a year of experience on this bike is a good idea. Anyway, already planning mods for the 1600 and I love the looks of those HK's. Also want quick release saddlebags and a quick release windshield.

[bross]

Originally Posted by Zukdriver

Is there an after market exhaust that is qiuet? I really don't think I want aything louder than stock, but I would like let it breathe a bit better.

I'm just sticking with stock for awhile, but when I do put pipes on, I will be using Supertrapp. I saw a show on how they design / build their pipes and I'm sold. You can "tune" the pipes for sound / power etc. simply by adding or removing discs.
Supertrapp


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Q. What is the major benefit of using SuperTrapp products?
Tuneability, quality, and years of performance exhaust experience and testing. We do not release SuperTrapp products to the market unless we can show a documented performance improvement. SuperTrapp tuneable disc mufflers have been proved to make power for years. The reason is that SuperTrapp discs provide a scavenging effect. Here’s how it works: the gap between each disc ranges from .023-in. wide on the inside of the muffler, to .028-in. on the external open edge. As hot exhaust gases pass through the discs to exit the muffler, they enter a larger area, creating a slight pressure drop as the gas expands, creating a scavenging effect for the hot gas still inside the muffler. Adding discs increases the size of the exhaust outlet area. Removing discs decreases the exhaust outlet surface area. Many competitors have tried to copy our disc design, but have never been able to duplicate the performance of genuine SuperTrapp discs.

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Q. How do the diffuser discs work?
SuperTrapp is the original tunable muffler. The SuperTrapp exhaust system allows you to adjust, or “fine tune,” the sound level, powerband and performance. SuperTrapp’s exhaust outlet is formed by a precise gap between a series of individual discs. Adding discs increases the size of the exhaust outlet, increases exhaust flow and exhaust tone while reducing backpressure. More discs move the power band up to give you more top-end power, and lean out the carbureted fuel mixture. Removing discs decreases the size of the exhaust outlet, decreases exhaust tone, and exhaust flow while backpressure is increased. Fewer discs tend to increase low-end torque and richen the carbureted fuel mixture. Diffuser discs allow you to compensate for changes in altitude and air temperature without re-jetting or changing your air intake. And, besides reducing noise, our discs function as United States Forest Service-approved spark arrestors (USFS T-102), making them a safer choice for off-road motorcycles and ATVs.

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Q. How many diffuser discs should I run?
The answer depends on your displacement: disc diameter, power band, and noise level. Fewer discs reduce sound levels, more discs increase sound levels. Fewer discs increase low-end torque and richen the carbureted fuel mixture. More discs increase sound levels, increase top-end power and lean out the carbureted fuel mixture. NOTE: When tuning an exhaust system, start with fewer discs and add. Never start with a lot of discs and subtract. Generally on a stock set up (no engine modifications, and stock carb and air filter), you can start with six to eight discs on dirt bikes and ATVs. On V-twin, metric and cruiser bikes, start with twelve discs. A popular misconception: The more free-flowing an exhaust system is, the more power it will make. This is not true. Some backpressure (2-3 PSI) is necessary to achieve maximum power. This is why it is necessary to use the discs that come with your tunable SuperTrapp exhaust. The number of discs to use will depend on your application, displacement, disc diameter and power band. To assess the performance of any product that affects horsepower and torque, lap times and Dyno- runs are your best indicators. However, since most enthusiasts usually only have a “seat-of-the-pants” Dyno, running condition is the most obvious indicator. Pay attention to the coloration of the discs. Little or no disc coloration indicates a possible lean condition (remove one or two discs). Black or sooty discs are indicative of a rich, or oil burning condition (add one or two discs). Discs that turn a tan or golden color indicate an acceptable balance of fuel mixture and exhaust flow. Reading a spark plug is the quickest way to check if everything in the engine is working as it should. And, it will tell if the SuperTrapp has been tuned properly. A rust-brown spark plug color indicates that the plug is operating smoothly (exhaust is tuned correctly). A whitish look indicates that the burn is too lean (remove one or two discs). A blackish deposit on the plug electrodes (left by oil or fuel traces) indicates that the burn is too rich (add one or two discs).

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Q. How do SuperTrapp mufflers reduce noise?
Sound energy in SuperTrapp mufflers is reduced in two ways: it is absorbed through a perforated core inside the body of the muffler, and it is diffused 360º radially as the exhaust passes through the discs. The number of discs used determines how much total sound energy will be absorbed and diffused. Fewer discs will have less open area and tone down the exhaust note. Most mufflers today reduce noise levels in several different ways, such as sound absorption, reflection using baffles or resonating chambers, or restriction. Physics tells us that air in motion does not like to change direction. Original equipment mufflers typically change the direction of airflow 90° to 180° several times as it passes through chambers or is deflected by baffles.

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[Zukdriver]

I went here: http://www.supertrapp.com/ They don't seem to have one for the Mean Streak yet. Sounds like what I'm looking for though. Maybe I should e-mail them and see what's up.

[T-man]

I put Roadhouse 4" Slip-Ons on my V2K...they have a nice, deep rumble. They are like glass packs. Not obnoxiously loud like most Harley types go after.

My V&H straights are quite loud,,,,with baffles in!!

Good hunting!

[bross]

Originally Posted by Zukdriver

I went here: http://www.supertrapp.com/ They don't seem to have one for the Mean Streak yet. Sounds like what I'm looking for though. Maybe I should e-mail them and see what's up.

Sure they do, Metric Mean Mothers:
Mean Mothers
Mean Mothers Kaw Mean Streak 02-05 #138-61500 $527
I like the look.

[Phatboy]

Originally Posted by TBVulcan

Phat, How did you like the sound of those HK 3" Big Straights before you modified them? I don't have a 1600 Classic, but I looked at a couple last night at my dealer. I will be buying one next spring most likely. Fell in love almost immediately! Not willing to take a big hit on my 800, plus getting a year of experience on this bike is a good idea. Anyway, already planning mods for the 1600 and I love the looks of those HK's. Also want quick release saddlebags and a quick release windshield.

Too loud which is why I modded the baffles. It is a trick people use to give a little backpressure on drag pipes and I decided to go out on a limb and try it in my baffles. While I do think the HK 3" Big Straights are the best looking pipe on th market for the 1600, if I had to do it over again I'd get the Sideburner.