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All 650's Akrapovic Owners, HELP!

marcgo

2021
CB650R
Aug 30, 2021
Riding Since
2021
35BF722C-F815-4124-AD88-64A7F68E64E5.jpegI have a full system Akrapovic exhaust, but after every ride it gets discolored like this in this part specifically, a blue discoloration. Which as of now causes no problems asides from that other people who have the same exhaust don’t experience it to this degree. It goes away when I clean it with polish but comes back after a ride. Is this normal? Did I mess anything up? Any help would be really appreciated!
 

baugustine

2014
CBR650F
Staff
May 21, 2016
Ventura, CA
I would not say that is normal. Mine had several thousand miles on it an never did that. I’d contact customer service and get another perspective.
 

miweber929

2014
CBR650F
650 Alumnus
Staff
Feb 13, 2015
Woodbury, MN
Riding Since
1975
View attachment 12240I have a full system Akrapovic exhaust, but after every ride it gets discolored like this in this part specifically, a blue discoloration. Which as of now causes no problems asides from that other people who have the same exhaust don’t experience it to this degree. It goes away when I clean it with polish but comes back after a ride. Is this normal? Did I mess anything up? Any help would be really appreciated!
That looks to be the area where the aftermarket cat goes, am I correct in the fact you have one? If so, I’d say that’s very normal.
 

Halliparta

2021
CB650R
Apr 10, 2022
Riding Since
2999
Isn’t bluing the sign of an exhaust leak?
Could be leaking from the muffler connection by the look of it.
Try spraying some soapy water over the connection after cold start (before it gets hot) to see if any bubbles come out.
 

FogDucker

2018
CB650F ABS
Apr 3, 2019
Canada
Riding Since
2000
the color change is very consistent, I will rule out the leak. it can be your Catalyst as miweber929 @miweber929 mentioned. it is due to Cat getting super hot to operate properly. it will react with Titanium and create Titanium dioxide. you can polish it off.

1653056960478.png
 
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habanadj

2018
CB650F
Jun 26, 2019
Mine is going in that direction, maybe humidity?. BTW my engine paint it gets discolored too
 

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Atucker

2019
CBR650R
Aug 18, 2020
Riding Since
2001
Are the mufflers on akra titanium line actually titanium? I know its called the "titanium" line, but is advertised as stainless. Whereas only the "racing" line is actually advertised as titanium construction.
 

FogDucker

2018
CB650F ABS
Apr 3, 2019
Canada
Riding Since
2000
Are the mufflers on akra titanium line actually titanium? I know its called the "titanium" line, but is advertised as stainless. Whereas only the "racing" line is actually advertised as titanium construction.
Headers are Steel. Can is Ti
 
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CBRay

2021
CBR650R ABS
Nov 9, 2021
Riding Since
2020
Slight golden brown maybe? Anyone else want toast now?

This is after about 300 miles or so, no cat.
 

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miweber929

2014
CBR650F
650 Alumnus
Staff
Feb 13, 2015
Woodbury, MN
Riding Since
1975
I would expect to see discoloration like Goblin @Goblin has if you don’t have a cat in the pipe. To me at least, the deep blue is indicative of the super hot area, probably catalytic converter.

marcgo @marcgo and habanadj @habanadj have not confirmed their bike has a cat or not, or said they have other mods that would cause the bike to run exceptionally hot. My ‘14 did not look like that, though I’m pretty sure mine was a model not able to run a cat.
 

Dontpush

2020
CB650R ABS
Mar 8, 2020
Riding Since
2017
Yeah mine turned gold after about 500 miles, so I just made everything else gold to match. 🤷‍♂️ ✨
 

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