Author Topic: Flow restricted exhausts - Norge, maybe other CARCs as well  (Read 1579 times)

Offline Meinolf

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Flow restricted exhausts - Norge, maybe other CARCs as well
« on: March 28, 2018, 10:35:42 AM »
Hi,

while servicing the Norge I also added weld-in bungs to both exhausts. And noticed quite sizeable welds in the the exhausts.





I estimate a reduction of ~10% of the flow area, so they were removed with a grinder.





The welds join the inner and outer tubes, so they are likely to appear in all exhausts.

Cheers
Meinolf
« Last Edit: March 29, 2018, 12:36:30 AM by Meinolf »

Offline JeffOlson

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Re: Flow restricted exhausts - Norge, maybe other CARCs as well
« Reply #1 on: March 29, 2018, 12:56:21 AM »
Wow! I wonder if the factory engineers took sloppy welds into account?
2018 Vespa GTS 300
2016 Moto Guzzi Norge
2015 Vespa Sprint 150
2015 Vespa GTS 300

pete roper

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Re: Flow restricted exhausts - Norge, maybe other CARCs as well
« Reply #2 on: March 29, 2018, 01:37:47 AM »
Another reason to love my single skin Arrow Ti headers.... :evil:

Offline Meinolf

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Re: Flow restricted exhausts - Norge, maybe other CARCs as well
« Reply #3 on: March 29, 2018, 02:01:32 AM »
Hi,

I wouldn't call the welds sloppy, but the thickness is certainly not necessary. And the engineers most likely didn't expect welds at the circumference to be that thick.

Cheers
Meinolf

Offline Gliderjohn

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Re: Flow restricted exhausts - Norge, maybe other CARCs as well
« Reply #4 on: March 29, 2018, 07:06:56 AM »
The welds broke on my 2011 Norge. Shell started coming off.
GliderJohn
John Peters
Back in central KS

Offline Meinolf

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Re: Flow restricted exhausts - Norge, maybe other CARCs as well
« Reply #5 on: March 29, 2018, 10:10:24 AM »
Hi John,

remember the Liberty ships? it's never the weld that breaks, it's always the material next to it.

Cheers
Meinolf

 

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