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Fiáin97

Only One Header Blue??

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Fiáin97
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I bought the bike new almost a year ago and it now has 4000 miles on it. After installing an akraopvic carbon exhaust I started to notice one header bluing. I installed a power commander, aftermarket air filter and got it mapped soon after but it's continued to blue over the past 1000 miles or so. I understand this is caused by heat, so my concern is one cylinder is working harder than the other- it's not so much the bluing I'm concerned with as much as it's only one of the pipes doing it. I haven't had the throttle bodies synced yet though it's on my list of things to try.

Possibly linked to this issue as it started at roughly the same time- when starting the bike up a few minutes after having taken it out for a ride, it idles erratically.

Has anybody any idea of the cause, any issue or damage which could result (loss of power, engine wear etc.) and how to remedy the problem. Thanks!

 

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Edited by Fiáin97

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peteinpa

Get em syncd. That should do it.


Got new red 2015 FZ-07 on 7/22/16!
Black 2006 Honda ST1300 53K miles.

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CarGuy7a

After you get them syncd. Take a fine polishing scotch brite sheet and clean off the bluing of both pipes then clean the pipes with alcohol or brake cleaner. Then watch the pipe color again over time to see if it has evened out. Looks to me like the right side cylinder is running leaner than the left. More heat, more color. 

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Fiáin97
6 hours ago, CarGuy7a said:

After you get them syncd. Take a fine polishing scotch brite sheet and clean off the bluing of both pipes then clean the pipes with alcohol or brake cleaner. Then watch the pipe color again over time to see if it has evened out. Looks to me like the right side cylinder is running leaner than the left. More heat, more color. 

Thanks for the advice I'll give it a go. One cylinder running leaner than the other is a concern. Any idea how something like that would have happened or how it could be be dealt with?

I'm considering uninstalling the exhaust and reinstalling to make sure the headers are seated correctly. I'm convinced they're fine as I used new gaskets and torqued them down to spec but it's a possibility. Tested for leaks and they were okay but may have missed something. It was only the second exhaust I've installed so room for error.

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sansnombre

You can get a pretty good temp difference indication with one of those laser-thermometers. They do not touch, but get a temp reading from a distance. Not sure of the cost, but that would tell you how the temp difference.

Possible, semi-clogged injector? Possibly the mapping is off somehow?

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Fiáin97
14 hours ago, sansnombre said:

You can get a pretty good temp difference indication with one of those laser-thermometers. They do not touch, but get a temp reading from a distance. Not sure of the cost, but that would tell you how the temp difference.

Possible, semi-clogged injector? Possibly the mapping is off somehow?

@sansnombre I might be able to get a hold of one from a friend thanks for the suggestion. Not sure about the injector, the bike is relatively new but something I hadn't thought about if all else fails. The map shouldn't be an issue as the bluing predates the map put on it.

 

12 hours ago, Beemer said:

According to this an exhaust leak could also be the culprit.

stop-bluing-motorcycle-exhaust-pipes-800

Excessive heat from exhaust gases can cause a motorcycle's shiny chrome exhaust pipes to quickly discolor and turn blue. Bluing is...

 

@Beemer Thanks I had a read. I think I'll uninstall and reinstall this weekend with new gaskets and be extra vigilant with seating everything correctly, should hopefully eliminate this possibility.

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Beemer

Have you tested them for leaks yet? I would do that first for obvious reasons. GL and let us know what you find out.


Beemer

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Fiáin97

@Beemer I did but not with a long candle lighter like I've seen suggested elsewhere, I'll pick one up and try. Thanks, haven't been able to enjoy the bike since these issues appeared so can't wait to have it back on form again! I have the second service due in a couple of weeks so if all else fails I'll let the lads at Yamaha see to it and pray it's something covered by warranty.

Commuted to work earlier and the idle is now so erratic after a ride it's begun to stall (condition getting worse). I have a feeling this and the uneven header discolouration are definitely related... Decided to park it up until I address the issue, can't afford to be causing undue wear or damage. The list of things to try so far:

-Check exhaust for leaks

-Check temp of each header

-Uninstall and reinstall exhaust being careful all components are properly seated, sealed and torqued to spec (+ new OEM gaskets)

-Sync throttle bodies

Any more suggestions welcome, would love to solve this before the service.

*May get a video of the rough idle uploaded if I get the chance.

 

Edited by Fiáin97
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