Author Topic: Mgx-21, which exhaust?  (Read 782 times)

Offline 1BADMGX

  • New Goose
  • *
  • Posts: 13
  • Location: West Covina CA
Mgx-21, which exhaust?
« on: February 20, 2019, 12:21:05 AM »
Just got myself a new MGX-21, and trying to figure out what exhaust to install, all I see is the OEM Guzzi slip-ons, Mistral slip-ons, and Agostini slip-ons in steel or carbon fiber.
I'm leaning towards the Agostini carbon fiber slip-ons, because of their lightness, but I'm wondering if they will hold up like the steel ones will.
Back in the day I had carbon fiber silencers on other bikes but they ended up coming apart, are they better now?
TIA Alex.

Online Rusnak_322

  • Guzzi Mentor
  • ****
  • *
  • Posts: 344
  • Location: Cleveland, Ohio AREA
Re: Mgx-21, which exhaust?
« Reply #1 on: February 20, 2019, 09:34:18 AM »
Not to be snarky, but you care about weight on a 750+ lb bike??

I have had lots of carbon fiber exhausts. As long as you dont store them in the direct sun, don't run super lean and don't wash with harsh chemicals they will last a long time.
1975 Moto Guzzi 850T - cafť racer in progress
2007 Ducati Monster S4Rs


Online Ncdan

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • Posts: 2080
Re: Mgx-21, which exhaust?
« Reply #2 on: February 20, 2019, 12:09:02 PM »
Just curious as to why to replace new mufflers? I have a 1400 tourer which I think is the same motor and I find the sound to hit a quite pleasant note.

Online izzuG

  • New Goose
  • *
  • Posts: 17
  • Location: Western Mass
Re: Mgx-21, which exhaust?
« Reply #3 on: February 20, 2019, 12:38:57 PM »
My carbon fiber exhaust on my Ducati is 17 years old, still look brand new. As mentioned earlier, long term sun exposure is detrimental. I clean mine with Plexus, works great.

Online rocker59

  • Moderator
  • Guzzi Hero
  • *
  • *****
  • *
  • *
  • *
  • *
  • *
  • Posts: 22921
  • "diplomatico di moto"
  • Location: NW Arkansas
Re: Mgx-21, which exhaust?
« Reply #4 on: February 20, 2019, 12:48:13 PM »
Just curious as to why to replace new mufflers? I have a 1400 tourer which I think is the same motor and I find the sound to hit a quite pleasant note.

Reason?  To release the beautiful sound.  OEM exhausts are extremely quiet.  I don't know how you know its pleasant, what with wind noise, helmet, ear plugs.  No way you can hear an OEM exhaust on any machine while riding it.
Michael T.
Aux Arcs
1996 Moto Guzzi Sport 1100
"Do what you can, with what you have, where you are." - Theodore Roosevelt

Online Kiwi Dave

  • Guzzi Hero
  • *****
  • *
  • Posts: 1004
    • Guzzi Gander Ltd
  • Location: Auckland, New Zealand
Re: Mgx-21, which exhaust?
« Reply #5 on: February 20, 2019, 12:53:00 PM »
Also stock is too large.  When choosing your carbon fibre slip-ons, you might want to consider if they allow you access to the rear axle without having to remove them.

Online Ncdan

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • Posts: 2080
Re: Mgx-21, which exhaust?
« Reply #6 on: February 20, 2019, 01:47:26 PM »
Reason?  To release the beautiful sound.  OEM exhausts are extremely quiet.  I don't know how you know its pleasant, what with wind noise, helmet, ear plugs.  No way you can hear an OEM exhaust on any machine while riding it.
I totally understand your logic as I have been through the loud pipe days on Harley's. I guess my constant ringing ears wouldn't know much difference either way however I do find a comfort in quietness in my later years of ridding
👍

Online rocker59

  • Moderator
  • Guzzi Hero
  • *
  • *****
  • *
  • *
  • *
  • *
  • *
  • Posts: 22921
  • "diplomatico di moto"
  • Location: NW Arkansas
Re: Mgx-21, which exhaust?
« Reply #7 on: February 20, 2019, 02:42:04 PM »
I totally understand your logic as I have been through the loud pipe days on Harley's. I guess my constant ringing ears wouldn't know much difference either way however I do find a comfort in quietness in my later years of ridding
👍

The tinnitus is more likely due to wind noise from not wearing ear plugs while riding.  I suffer the same problem.  It took me years to come around.  The ringing in my left ear can be nasty some days.

Still, I do enjoy a nicely tuned V-twin exhaust.  80-dB stockers are just too quiet!
Michael T.
Aux Arcs
1996 Moto Guzzi Sport 1100
"Do what you can, with what you have, where you are." - Theodore Roosevelt

Online Ncdan

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • Posts: 2080
Re: Mgx-21, which exhaust?
« Reply #8 on: February 20, 2019, 03:20:51 PM »
The tinnitus is more likely due to wind noise from not wearing ear plugs while riding.  I suffer the same problem.  It took me years to come around.  The ringing in my left ear can be nasty some days.

Still, I do enjoy a nicely tuned V-twin exhaust.  80-dB stockers are just too quiet!
Inhear ya Brother, maybe I should try a little louder bark that woukd override this terrible ringing that I cannot escape. Looks like modern medical science could help up with this curse. Sometimes I think being deaf would be better than this if it would stop the ringing:(

Offline Luap McKeever

  • Owner, WildGuzzi.com
  • Administrator
  • Guzzi Hero
  • *
  • *
  • Posts: 3246
  • Lead, follow, or get out of the way!
    • Wildgoose Chase Moto Guzzi
  • Location: Mountain, Missouri
Re: Mgx-21, which exhaust?
« Reply #9 on: February 20, 2019, 07:13:21 PM »
I put Mistrals on mine. Love them.  The bike popped a bit afterwards, but a new Beetle map cured that.  Here's a video of mine:

https://www.youtube.com/watch?v=V_yTLysSqxI
205,000 Moto Guzzi miles and counting since 1997.
2017 MGX-21 Flying Fortress
2001 California Special

Offline leroysch

  • Weekend Warrior
  • ***
  • *
  • *
  • *
  • *
  • Posts: 182
  • Location: Neosho, MO
Re: Mgx-21, which exhaust?
« Reply #10 on: February 20, 2019, 07:56:10 PM »
I put Mistrals on mine. Love them.  The bike popped a bit afterwards, but a new Beetle map cured that.  Here's a video of mine:

https://www.youtube.com/watch?v=V_yTLysSqxI

Heard these for real...they sound great!
'88 FLST
'95 Ducati 916
'04 V11 LeMans
'06 FLHX
'09 Buell 1125R
'13 F6B
'17 BMW R Nine T

Online kingoffleece

  • SplitWeight(tm) seat covers
  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • *
  • *
  • Posts: 2148
  • Rated 5 STARS Motorcycle Consumer News
    • King of Fleece LLC SplitWeight(tm) seat covers
  • Location: Western New York
Re: Mgx-21, which exhaust?
« Reply #11 on: February 20, 2019, 07:58:53 PM »
I've heard Agostini's on a 1400 motor.  Glorious.
SplitWeight(tm) seat covers. A King of Fleece LLC product.

Offline Daleroso

  • Guzzi Mentor
  • ****
  • *
  • Posts: 361
Re: Mgx-21, which exhaust?
« Reply #12 on: February 20, 2019, 09:00:36 PM »
Hey there 1badmgx. I sent you a PM

Offline 1BADMGX

  • New Goose
  • *
  • Posts: 13
  • Location: West Covina CA
Re: Mgx-21, which exhaust?
« Reply #13 on: February 20, 2019, 10:52:17 PM »
Not to be snarky, but you care about weight on a 750+ lb bike??

I have had lots of carbon fiber exhausts. As long as you dont store them in the direct sun, don't run super lean and don't wash with harsh chemicals they will last a long time.

Not a deal breaker if the aftermarket exhaust is no lighter than stock,  but if I get the choice I'll always go for something that's lighter, the way I see it, if I can lighten the bike or get my fatass on a diet, it's ALWAYS a good thing.  :laugh:

Offline 1BADMGX

  • New Goose
  • *
  • Posts: 13
  • Location: West Covina CA
Re: Mgx-21, which exhaust?
« Reply #14 on: February 20, 2019, 10:57:16 PM »
Just curious as to why to replace new mufflers? I have a 1400 tourer which I think is the same motor and I find the sound to hit a quite pleasant note.

I think that Guzzies sound good too, but when I hear a non compliant exhaust on a V-twin, it's music to my ears.  :boozing:

Offline 1BADMGX

  • New Goose
  • *
  • Posts: 13
  • Location: West Covina CA
Re: Mgx-21, which exhaust?
« Reply #15 on: February 20, 2019, 11:44:08 PM »
Also stock is too large.  When choosing your carbon fibre slip-ons, you might want to consider if they allow you access to the rear axle without having to remove them.

I'm thinking if the aftermarket exhaust were shorter than stock, the exhaust heat/carbon soot might damage or discolor the non removable carbon fiber bags.

Offline 1BADMGX

  • New Goose
  • *
  • Posts: 13
  • Location: West Covina CA
Re: Mgx-21, which exhaust?
« Reply #16 on: February 20, 2019, 11:52:09 PM »
I put Mistrals on mine. Love them.  The bike popped a bit afterwards, but a new Beetle map cured that.  Here's a video of mine:

https://www.youtube.com/watch?v=V_yTLysSqxI
Thanks for the video, I think that your exhaust sounds really good, which way do you run your bike, with the Db killers in or out?
And what is the Beetle map?

Offline JohninVT

  • Guzzi Hero
  • *****
  • Posts: 548
Re: Mgx-21, which exhaust?
« Reply #17 on: February 21, 2019, 03:21:12 AM »
I have Mistrals on my Tourer and theyíre borderline too loud with the dB killers in.  They also make an odd, flat sound when you chop the throttle at 3,000rpm that sounds like the jake brake on a semi.  I think itís from the mapping going super lean from 3,000 to 2,700.  Iím hoping a Beetle map will cure it.  The 1400 Mistral exhaust is MUCH louder than the one I had on my 1200 Sport.  With the dB killers out itís ridiculous.  Way too loud, way too lean.  It popped and made the flat spot more noticeable.  Again, maybe a Beetle map would cure that but the volume of noise was not anything I wanted to put up with. 

Offline blu guzz

  • Weekend Warrior
  • ***
  • Posts: 209
  • Loves to ride
  • Location: Northern Kentuycky
Re: Mgx-21, which exhaust?
« Reply #18 on: February 21, 2019, 06:02:22 AM »
The Agostinis on my 1400 are just right.  At 50 mph and up, with the touring shield and ear plugs in, you can just barely hear them.  When you give it the gas, they sing.  With the summer/fly shield, you don't hear them at all unless accelerating.  Db killers are in place.  IMO way too much without them.
Blue Guzz

Offline Luap McKeever

  • Owner, WildGuzzi.com
  • Administrator
  • Guzzi Hero
  • *
  • *
  • Posts: 3246
  • Lead, follow, or get out of the way!
    • Wildgoose Chase Moto Guzzi
  • Location: Mountain, Missouri
Re: Mgx-21, which exhaust?
« Reply #19 on: February 21, 2019, 07:19:24 AM »
Thanks for the video, I think that your exhaust sounds really good, which way do you run your bike, with the Db killers in or out?
And what is the Beetle map?

I've had the killers out for a while.  Oddly enough, with them in or out they put off the same exact amount of Db.  But, the "pitch" with them in isn't as sharp as when they're out. This was all before the Beetle map was installed. Afterwards, it seemed to actually quiet things a bit so I pulled them back out. Now, I think they're perfect.

See this post for all things Beetle. You can thank me later. https://wildguzzi.com/forum/index.php?topic=96957.0
« Last Edit: February 21, 2019, 07:21:22 AM by Luap McKeever »
205,000 Moto Guzzi miles and counting since 1997.
2017 MGX-21 Flying Fortress
2001 California Special

Offline mjptexas

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • *
  • Posts: 1025
Re: Mgx-21, which exhaust?
« Reply #20 on: February 21, 2019, 08:48:34 AM »
I have Agostinis on my 1400 and one of my riding buddies has Mistrals on his.

IMHO each brand has a distinctive sound:

- Agostinis have what I describe as a 'bark' when you blip the throttle.
- Mistrals have more of a deep rumble.

I rather like the way Mistrals sound but prefer the look of Agostinis.
Mike

'18 R Nine T Urban GS
'17 Griso
'16 XL1200 Roadster
'15 Monster 821
'14 Cali Custom
'14 Vespa GTS300 Super
'15 Vespa Primavera

Online Kiwi Dave

  • Guzzi Hero
  • *****
  • *
  • Posts: 1004
    • Guzzi Gander Ltd
  • Location: Auckland, New Zealand
Re: Mgx-21, which exhaust?
« Reply #21 on: February 22, 2019, 04:59:57 PM »
I'm thinking if the aftermarket exhaust were shorter than stock, the exhaust heat/carbon soot might damage or discolor the non removable carbon fiber bags.

I've never had any issues with my short aftermarket exhaust and my C-bow bags.  Mine ain't carbon fiber, but since they make mufflers from carbon fiber I'm thinking it shouldn't be an issue.

Online j.r.r.

  • Weekend Warrior
  • ***
  • *
  • *
  • Posts: 112
  • Location: Ontario, Canada
Re: Mgx-21, which exhaust?
« Reply #22 on: April 01, 2019, 07:34:30 PM »
I have Agostinis on my 1400 and one of my riding buddies has Mistrals on his.

IMHO each brand has a distinctive sound:

- Agostinis have what I describe as a 'bark' when you blip the throttle.
- Mistrals have more of a deep rumble.

I rather like the way Mistrals sound but prefer the look of Agostinis.

I 100% agree. Installed Agostini pipes on my Audace because I like the look but will put Mistral pipes on my new Eldorado. The "more of deep rumble" is perfect description of those pipes.
2016 Audace
2016 Eldorado

 

***Wildguzzi Official Logo High Quality 5 Color Window Decals Back In Stock***
Shipping in USA Only. Awesome quality. Back by popular demand. All proceeds go back into the forum.
http://www.wildguzzi.com/Products/products.htm
Advertise Here