Author Topic: A little bit louder please.  (Read 2576 times)

Offline GuzziNZ

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A little bit louder please.
« on: August 03, 2026, 04:28:47 AM »
I have a nice set of stock mufflers on my T but as someone told me, it sounds like an asthmatic budgie!
Is there a way of making them sound a bit better without cutting the mufflers to bits?

Online MikeP996

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Re: A little bit louder please.
« Reply #1 on: August 03, 2026, 06:43:56 AM »
If YOU like the sound, ignore somebody else's opinion!  ;)
2021 Moto Guzzi V7 850 Special (UK)
1976 Honda CB400F (UK)
2017 BMW R1200RS (TX)
'73 Norton Commando (Mexico
2015 BMW R9T (Mexico)
(Wife's bikes:
2015 Ducati Diavel (TX)
2019 Honda Africa Twin  (Mexico)
2021 Honda NC750  (UK)

Online Antietam Classic Cycle

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Re: A little bit louder please.
« Reply #2 on: August 03, 2026, 08:23:49 AM »
I have a nice set of stock mufflers on my T but as someone told me, it sounds like an asthmatic budgie!
Is there a way of making them sound a bit better without cutting the mufflers to bits?

No. I've seen them with holes drilled in the back, and a drill bit run up through them. All that did was make them sound like crap.
Charlie


Offline DoubleGuzzi

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Re: A little bit louder please.
« Reply #4 on: August 03, 2026, 04:33:39 PM »
Replica Dunstalls will wake that bike up...
There goes another screwed up thread with that loooong URL!
Simply:
https://www.ebay.com/itm/236940205408
If you want to make it more obvious, to what you're suggesting:
https://www.ebay.com/itm/236940205408?_skw=Dunstall+muffler
Nearly natural progression..
Past: SS50, Z200, Z250B, Z400J, (H100), GT750, K100, ZR1100, 900 Trident, 955 Sprint ST, (ZR550, M600), 900 ST, (B750).
Present: V7III CS, (V50II), (V7C).


Online MikeP996

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Re: A little bit louder please.
« Reply #6 on: August 05, 2026, 12:53:49 AM »
Just be aware that a louder muffler does not mean "better performance"; it means "louder."  I have personally been involved in dyno tests where a straight-through muffler REDUCED power compared to a stock muffler.
2021 Moto Guzzi V7 850 Special (UK)
1976 Honda CB400F (UK)
2017 BMW R1200RS (TX)
'73 Norton Commando (Mexico
2015 BMW R9T (Mexico)
(Wife's bikes:
2015 Ducati Diavel (TX)
2019 Honda Africa Twin  (Mexico)
2021 Honda NC750  (UK)

Online PeteS

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Re: A little bit louder please.
« Reply #7 on: August 05, 2026, 08:11:00 AM »
Just be aware that a louder muffler does not mean "better performance"; it means "louder."  I have personally been involved in dyno tests where a straight-through muffler REDUCED power compared to a stock muffler.

This is true with the Dunstalls as well. They have a baffle across the bore to maintain back pressure.
Punch that out and power goes waaaaaay down.
Apologies for the link. When I pasted it, it was inside the margins. Must be the way this forum works.

Pete

Offline DoubleGuzzi

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Re: A little bit louder please.
« Reply #8 on: August 05, 2026, 09:46:32 AM »
Apologies for the link.
This is why I gave you the better way to enter/edit it, then some eejit  :tongue: comes along and quotes you, warts 'n' all. That would also need edited.
Dunno why I bother, sometimes.  :weiner:
Nearly natural progression..
Past: SS50, Z200, Z250B, Z400J, (H100), GT750, K100, ZR1100, 900 Trident, 955 Sprint ST, (ZR550, M600), 900 ST, (B750).
Present: V7III CS, (V50II), (V7C).

Online Antietam Classic Cycle

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Re: A little bit louder please.
« Reply #9 on: August 05, 2026, 10:24:09 AM »
I've used this type of Dunstall replica on several Guzzis and they sound good, without being too loud.
https://www.dimecitycycles.com/yamaha-xs650-dunstall-style-replica-universal-muffler-reverse-cone.html
Charlie

Online PeteS

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Re: A little bit louder please.
« Reply #10 on: August 05, 2026, 01:14:36 PM »
I will bet both versions of the Dunstall Mufflers are identical inside.
The only advantage of the wide mouth version is the baffle can be used to repair a set of
Original Dunstalls for someone doing a period restoration.

Pete

Offline Gliderjohn

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Re: A little bit louder please.
« Reply #11 on: August 05, 2026, 08:47:03 PM »
If you can afford it the Lafranconi Competizione mufflers are very well made with beautiful chrome work and a nice deep sound without being very loud. Look good too on my T-3.
GliderJohn




John Peters
Back in central KS

Offline ridingron

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Re: A little bit louder please.
« Reply #12 on: August 05, 2026, 10:09:35 PM »
This is why I gave you the better way to enter/edit it, then some eejit  :tongue: comes along and quotes you, warts 'n' all. That would also need edited.
Dunno why I bother, sometimes.  :weiner:

To emphasize the point.  You're welcome.  :wink:

 

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