How to quiet Cobra Speedsters Longs - I got the solution! UPDATE - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #1 of 24 (permalink) Old 08-01-2011, 01:15 PM Thread Starter
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How to quiet Cobra Speedsters Longs - I got the solution! UPDATE

UPDATE -
(You can read the last post in here, thought I would give credit where credit is due to all the people in here that posted the solution below would not last long. They were correct and this post is useless, except for those who were thinking about trying it, its doesnt last long.) I did find a a solution that works, it will last, most likely longer then the Cobra pipes and will post it in the coming week, in fact, I love it, saved me from going back to stock pipes and still have the look I wanted, more so on the current V Star, simply because the V Star pipes are bulky. I honestly like the stock C 50 pipes.)

Even though this was for my new bike, I know it came up before with the C 50. This worked out perfect for me! Im amazed at the difference and it only cost $5.00 to try! Anyway, thought I would share it with you.

Well, it's final!
I think I have invented the perfect solution.
As much as I loved the sound of the Cobra Speedsters with the stock baffles, they were a bit to loud.
I since tried the Cobra Quiet Cores, quiet they are not and I dont like the sound, I am returning them.

Here was my solution, I am THRILLED about it.
I installed fiberglass wrap around the original straight through Speedster Baffles that come with the pipes. It was SO SIMPLE it only took minutes and less then $5.00.

1. Went to Lowes Home Improvement store and purchased Frost King Hot and Cold pipe fiberglass insulation from the plumbing department. The Frost king works perfect because it is nice and thin, which you need for the narrow pipes.
2. I Removed the original Cobra (straight through) baffles and wrapped the pipe insulation tightly around the baffle overlapping the insulation by about a half inch for each wrap around the pipe. I needed nothing to hold it in place as I did it.

Here is what I did:
1. Remove one baffle at a time, spray a little WD-40 on the wide part of the baffle, then reinsert the very tip of one end, you will then leave the very end of the tip in the pipe to hold the pipe while wrapping the insulation.

2. Cut a very long (5 foot?) piece of insulation and wrap the Frost King Fiberglass insulation around the pipe nice and tight, overlapping about a half inch each time you wind it around.

3. Once the holes of the baffle are fully wrapped cut off any remaining fiberglass and twist the baffle as you slide it back into the pipe in the direction so it doesn't unwind. I needed nothing to hold it in place since the winding action and tight clearance did that job for me.

4.Your all done! It was sooooo easy, one of those projects I thought would be impossible, turned into something easy.

I started the bike up and WOW. REALLY big difference, NICE deep rumble with just enough sound, for lack of better words, powerful. Took the bike for a ride, can drive in my community without bothering my neighbors, yet is noticeable for sure.
The REALLY cool part is you preserved the open pipe and baffles unrestricted flow, so when you get on the throttle heavy, the exhaust still screams really nice!

I couldnt be more happy, it really worked out well after considering so many other solutions including going back to the stock pipes.

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Last edited by alarmguy; 09-27-2011 at 05:33 PM.
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post #2 of 24 (permalink) Old 08-01-2011, 03:53 PM
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I think over time the fiberglass will Burn out some.. I would use something to mount the baffle in place... or it may go flying someday..



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post #3 of 24 (permalink) Old 08-01-2011, 04:11 PM
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Just asking.
but wouldn't the fiberglass from a motorcycle shop be higher temp type?
I know J&P cycles sells it for bikes.



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post #4 of 24 (permalink) Old 08-01-2011, 04:57 PM Thread Starter
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Originally Posted by Red-C-50 View Post
I think over time the fiberglass will Burn out some.. I would use something to mount the baffle in place... or it may go flying someday..
I don't think it will burn some, but may, who knows, by then enough carbon left overs should be in there. Most automobile mufflers use fiberglass as well as you home water heater/furnace. Also the insulation is protected by the metal baffle with slots leading to the insulation to absorb sound, out of the way of the exhaust.

The baffle is mounted in place, its the original baffle that came with the pipes, I just unbolted it, wrapped it and bolted it back in place.

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Last edited by alarmguy; 08-01-2011 at 05:05 PM.
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post #5 of 24 (permalink) Old 08-01-2011, 05:03 PM Thread Starter
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Originally Posted by Boxwrench View Post
Just asking.
but wouldn't the fiberglass from a motorcycle shop be higher temp type?
I know J&P cycles sells it for bikes.
I am unsure of the higher temp type, its possible but I doubt it.
I only say that because fiberglass is used for all types of furnace and heat applications, simply because is is fireproof.

Yes, MANY places sell the muffler insulation problem is with the Cobra Longshots are they are a duel exhaust and the pipes are narrow and the baffle only leaves a fraction of inch room to put any packing.
Most of that packing was designed for the wide mufflers and stuff you see on sport bikes.
Many people tried the muffler insulation but it was to thick. I assume you could peal it apart but that, to me is a little funky because you would have to pull it apart being you could only fit insulation about 1/4 inch thick.

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Last edited by alarmguy; 08-01-2011 at 05:06 PM.
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post #6 of 24 (permalink) Old 08-01-2011, 05:42 PM
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I figured you could use a potato to silence those bad boys
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post #7 of 24 (permalink) Old 08-01-2011, 06:15 PM
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I wrapped the baffles in my vance and hines straightshots with the fiberglass rope that goes around fireplaces to seal them up. Worked fairly well, but there isn't much room between the baffle and the pipe. I wish vance and hines made some quiet baffles for them.
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post #8 of 24 (permalink) Old 08-01-2011, 06:26 PM
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Originally Posted by Red-C-50 View Post
I think over time the fiberglass will Burn out some.. I would use something to mount the baffle in place... or it may go flying someday..
I'm thinking about 15 minutes.
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post #9 of 24 (permalink) Old 08-01-2011, 10:14 PM Thread Starter
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I'm thinking about 15 minutes.
Ummm, I dont think ever, every single car sold in this country has fiberglass packing in the muffler.

Heck, every single quiet bike sold in the country does too.

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post #10 of 24 (permalink) Old 08-01-2011, 10:17 PM
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I put hard kore baffles in my cobras and love it now quiet when I need and loud when I need

2009 c50se ,cobra street rods hard kore quite baffles ,power commander 5,mustang seats, tank bib,hyper charger ,dyno tuned 47.99 hp,custom hard bags, custom light bar with led,s , hand painted pins and flames, big air horn metzlier 880 tires
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