Can yellowing - Causes?

[Hefty]

Quick question.. what causes this yellowing / discolouring (rust..?) on exhausts.. Is it cause for concern & can it be got rid?

https://i.imgur.com/1J3iPcT.jpg?1

https://i.imgur.com/pZtemMN.jpg?1
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'13 Honda CBF125 // '99 Suzuki SV650s // '98 Honda CB600F Hornet

[Itchy]

Heat causes it. Look at your down pipes. Downpipes go yellowy/brown all the time.

Autosol or other polish brand and it will polish back to the shiny metallic colour.
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Spain 2008France 2007Big one 2009 We all die. The goal isn't to live forever, the goal is to create something that will. In the end, your life will flash before your eyes. Make sure it is worth watching.

[Hefty]

Cheers

Does it happen more on stock cans?
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'13 Honda CBF125 // '99 Suzuki SV650s // '98 Honda CB600F Hornet

[RhynoCZ]

Yes and no, but I'd say yes as they tend to be more restrictive (the heat accumulates easily). The worst case scenario is yellow turning into black and black into a hole in the exhaust system.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[MCN]

It's the effects of oxygen reacting with the metal at certain temperatures. The darker blue colour indicates the metal has been exposed to oxygen at a higher temperature than the yellows.

Some like it's 'decorative' appeal. Some like their shit shiny.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[ZRX61]

It's caused by a lack of Solvol & elbow grease. This pipe was fitted 17 years ago
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They're not one night stands, they're auditions.

[Ariel Badger]

[ZRX61]