Exhaust Sound Question? - Victory Forums - Victory Motorcycle Forum
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post #1 of 20 (permalink) Old 04-10-2013, 09:52 AM Thread Starter
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Default Exhaust Sound Question?

Hi guys, I hear my first Vic in person yesterday with shotgun pipes. I have been listening to a lot of youtube clips as well but I know that is hard to get an accurate sound.

My question is that at idle it sounds quite loud and lumpy which I like and under acceleration sounded quite good but when changing gears or backing of the throttle it sounded a bit puffy for want of a better word. Like it is leaking air from somewhere like a hole in the exhaust. Go you know what I mean? A lot of the YouTube clip make the same noise when the give it a quick rev. Good on the way up and no so on the way down.

My HD night Rod never did that with the V&H pipes and a lot of Harley's I've hear with pipes don't do that either.

Is it the pipes that are doing that or is it just a characteristic of a Victory engine?

I hope this makes sense.
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post #2 of 20 (permalink) Old 04-10-2013, 10:42 AM
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Sounds like you might be describing the popping on decel that often occurs with aftermarket exhausts especially when no fuel management system is added or the fuel management isn't tuned properly.
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post #3 of 20 (permalink) Old 04-10-2013, 11:08 AM
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I have shotgun pipes on my vegas 8 ball, and in idle my exhaust sounds just fine!!

2009 Victory Vegas 8 Ball
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post #4 of 20 (permalink) Old 04-10-2013, 12:10 PM Thread Starter
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I don't mean at idle. Most Vic's with pipes sound good when you start them and let them idle. It's when they are revved and its on the back off part that that sound a bit puffy/airy. Ill try and find a YouTube clip to show what I mean as best I can.
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post #5 of 20 (permalink) Old 04-10-2013, 12:34 PM Thread Starter
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Not the best example but first one I found. Will post others later. I hope this makes sense. Great at idle but puffy after being revved.

http://youtu.be/kgX6JaUkEbg
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post #6 of 20 (permalink) Old 04-10-2013, 02:38 PM
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Coming from two carburated Harleys that would go potato nicely, I've resigned myself that the Vic is simply going to have a different cadence. It has grown on me though.

After I add the RPW Thor I'm sure it will be different yet but lovely in its own way. Single pin crank maintains a lot of the classic v twin character though so it's a far far cry from a Honda or kawa cruiser though for that reason.

I attribute it to what Harleys would sound like if they evolved. The fun of these bikes is instant grat on the throttle instead of struggling, making a lot of heat and noise like my old Harleys did.

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post #7 of 20 (permalink) Old 04-10-2013, 02:39 PM
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And yes decel pop is an issue with these bikes. Good fueling is the ticket.

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post #8 of 20 (permalink) Old 04-10-2013, 04:04 PM
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I think I know what you are saying. When you rev the Harley and let the throttle go, it almost immediately drops back to idle, whereas the Vic takes a bit more time....fraction of a second, but still noticeable, to drop back.

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post #9 of 20 (permalink) Old 04-10-2013, 06:21 PM Thread Starter
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Quote:
Originally Posted by Billyrides View Post
I think I know what you are saying. When you rev the Harley and let the throttle go, it almost immediately drops back to idle, whereas the Vic takes a bit more time....fraction of a second, but still noticeable, to drop back.
That's right, you back off on the throttle on a HD and it goes back to its idle sound not vroom, pffft, pffft, pffft then idle. I know the revs have to drop but I want to avoid that sound.

It's not decibel popping either as I know tats a fuelling issue.

2 more quick examples


http://youtu.be/VZ5lM8fWh70

http://youtu.be/MA_81zqHkAM
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post #10 of 20 (permalink) Old 04-13-2013, 04:53 PM Thread Starter
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Any more advice on this? Since its the same 106 in all late Vic's what pipes give the best sound at idle and have the least airy sound?
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