Newb question about exhaust noise - VTXOA
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post #1 of 23 (permalink) Old 04-30-2016, 09:05 PM Thread Starter
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Newb question about exhaust noise

Ok, so this is a newb question I think, even though I've been riding street bikes for 30 years. So sorry, but...

Why does the VTX make a "huge sucking sound" when accelerating and changing gears? I know this sound isn't isolated to vtxs only as I've heard it on other (not all) bikes. It just seems extreme on my 1800. Sounds like it's sucking a catfish up the pipe!

Curious if there's some mod I can do to reduce or even eliminate.

2006 VTX 1800c (FI) stock airbox, stock header pipe with Roadhouse muffler

Thanks!
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post #2 of 23 (permalink) Old 04-30-2016, 10:56 PM
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post #3 of 23 (permalink) Old 04-30-2016, 11:08 PM Thread Starter
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Thanks. I was looking at that but wasn't sure that would have any effect. If you think it will improve that sound, I'm in.

Could the restrictive stock airbox be causing any of this?
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post #4 of 23 (permalink) Old 05-01-2016, 09:47 AM
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Quote:
Originally Posted by ceebass68 View Post
Thanks. I was looking at that but wasn't sure that would have any effect. If you think it will improve that sound, I'm in.

Could the restrictive stock airbox be causing any of this?
IMO, yes. But I would do the pair valve/desmog first, then re-evaluate.

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post #5 of 23 (permalink) Old 05-01-2016, 11:07 AM
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If you're talking about a whale farting sound when you roll off the throttle to switch gears, then it's the PAIR valve not the airbox. A stock airbox doesn't make any sound, at least mine didn't. Did you check it recently? Maybe a mouse made a nest in yours and it is restricting the airflow, don't laugh, happens all the time

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post #6 of 23 (permalink) Old 05-01-2016, 11:45 AM Thread Starter
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Originally Posted by Chicago-Spike View Post
If you're talking about a whale farting sound when you roll off the throttle to switch gears, then it's the PAIR valve not the airbox. A stock airbox doesn't make any sound, at least mine didn't. Did you check it recently? Maybe a mouse made a nest in yours and it is restricting the airflow, don't laugh, happens all the time
Whale fart... Love it! Much better description than my catfish. Thanks for the laugh!

Yes, I've recently had the airbox off and it's clean as a whistle. (Cept a tad of weep from the crankcase line.)

I was thinking stock airbox like it might be "asking" for more air.

Oh btw, is it still possible to get the "block off plate" for the desmog? The links in your write-up no longer connect.

Thanks again for the help!

Last edited by ceebass68; 05-01-2016 at 11:50 AM.
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post #7 of 23 (permalink) Old 05-01-2016, 12:08 PM
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I was wondering about the plates also as I have an interesting in doing the desmog. I searched the Honda parts website referenced in the article but didn't see them.

Anyone know anything about those plates?

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post #8 of 23 (permalink) Old 05-01-2016, 12:30 PM
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I was wondering about the plates also as I have an interesting in doing the desmog. I searched the Honda parts website referenced in the article but didn't see them.

Anyone know anything about those plates?

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http://www.vtx-parts.com/honda-vtx-f...lve-cover.html

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post #9 of 23 (permalink) Old 05-01-2016, 12:38 PM Thread Starter
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Awesome thanks fastspek! Ordered...
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post #10 of 23 (permalink) Old 05-01-2016, 12:41 PM
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Whale fart... Love it! Much better description than my catfish. Thanks for the laugh!

Yes, I've recently had the airbox off and it's clean as a whistle. (Cept a tad of weep from the crankcase line.)

I was thinking stock airbox like it might be "asking" for more air.

Oh btw, is it still possible to get the "block off plate" for the desmog? The links in your write-up no longer connect.

Thanks again for the help!
VTX_PARTS.com. Larry Olin. Michigan. Top quality machining, very reasonable pricing, in the $20 some range, depending if you want plain aluminum, or chromed. BE WARNED: He doesn't answer correspondence or calls, and once you place an order, DO NOT be in a hurry. It may take him up to 3 weeks to ship, but be assured: You WILL get them, and they WILL be worth it.
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