A 'Blueing' Exhaust

[haGGard]

Hi,

I was just wondering what exactly does a blueing exhaist mean? My exhaust is chromed and i have noticed that near when it joins to the engine, (Gasket? ) The chrome has turned a shiney bluey, purple colour.

Is this damaging or anything serious?

Cheers
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chaff mans random tingz on loot
"Why dont you go and weld your face to a moving train, you sack of pus" - tobyr
"ROFL MY TOFFLE I AM TEH 1337 SPELLING MISTAKE FINDER!" - BikerBen

[TheShaggyDA]

[instigator]

just the way stainless steel goes Mines a dingy brown/yellowy colour

well, mine are okay for being brown/yellow apparently. dont know what lue means

[haGGard]

[stinkwheel]

It is usually just a sign that you have been riding the bike hard (as nature intended) I love a nicely blued header pipe

If it has happened suddenly then you may have an issue that is causing the engine to run too hot. That said, I have seen the headers on my mates SOHC Z650 glowing red after a good hard blast on a dark night and there was nowt wrong with that other than excessive twisting of the right wrist

EDIT: Having just seen your post above.

1) CHECK YOUR PLUG!

2) Advance weights is referring to a centrefugal ignition auto-advance. In the unlikley event that your bike has these (they are on points ignitions), they very rarely malfunction. I have never heard of it. Your bike will have any ignition advance mapped into the CDI.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[TheShaggyDA]

Advance weights alter the timing of the spark dependant on engine RPM. Unlikely you've got them, as I'm guessing you don't have points ignition.
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Current: CB500 Previous: CB100N, CB250RS, XJ900F, GT550, GPZ750R/1000RX, AJS M16, R100RT, Enfield Bullet

[i:6e3bfc7581]But still I fear and still I dare not laugh at the madman...[/i:6e3bfc7581]

[haGGard]

Thats ok then I have no idea what a points ignition is

I will try and check my plug tomorow...
____________________
chaff mans random tingz on loot
"Why dont you go and weld your face to a moving train, you sack of pus" - tobyr
"ROFL MY TOFFLE I AM TEH 1337 SPELLING MISTAKE FINDER!" - BikerBen

[bish777]

This is perfectly normal for a single skinned exhaust pipe, and especially a single skinned zorst on a 2 stroke.
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GSXR1100J

[GOKU]

the real reason water...the pipes turn that colour due to high heating and water....rifeing ur bike to this point and heat means that it will rust from the inside out.

always ride in moderation dont tan it every where you go..and give your bike plety of cooling down times when on ride outs

this isent a serious problem theres nothing you can do about it its just one of those things that happen..make SS look better IMO

[mchaggis]

[Adam_P]

I thought that the bluing was a form of tempering, which is just the metal heating up and cooling down again.

It's just what steel does when put into that kind of heat, isn't it?

Sounds like we need Kickstart to give the right answer...!
____________________
Colin McRae MBE 1968 - 2007 RIP
Orwell Rolls in his Grave
God is imaginary

[mchaggis]

It is, just like steel. It's caused by high temperatures -> oxidisation. Running lean will cause excessively high temperatures as well as advancing the spark too far.

Just rag a bike with a high enough compression ratio and a lean enough burn and the chrome will blue when it gets hot enough.

Silver will go blue as well as black if you let it oxidise in the same fashion.
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I must not be a troll...
Mmmm, Guinness
Discovering the delights of Hammerite and a 3/4" brush.

[bish777]

It will happen on a normal bike in normal conditions with a single skinned zorst! God it doesnt necessarily have anything to do with running lean. Jeesh what a bunch of doomsayers you lot are.

My MZ carburetted perfectly, as did my XBR500 (which i ran a little rich if anything) and the zorsts on those blued off, OE on the MZ (yes i hada aBRAND NEW MZ!) and micron on the XBR.
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GSXR1100J

[mchaggis]

Note I said lean enough If you run rich enough, it just won't happen.
____________________
I must not be a troll...
Mmmm, Guinness
Discovering the delights of Hammerite and a 3/4" brush.

[Will87]

I can't remember if this works for either Stainless Steel or Chromed pipes, but a rag with a little bit of light oil on it rubbed over the blue areas when the pipes are hot is meant to get rid of the blueing.

[mchaggis]

[Will87]

mchaggis it's what i've heard recommended from my dad's friends (50 odd guys been bikers since they were 16/17). Just passing on the info, never tried it myself as i have not had the need. Besides oil on the exhaust pipe isn't bad, it just creates a bit of a hot oil mist. . . .

[binge]

Dont worry about it mate. Its just the chrome. My techniwank hasnt done it because its a laquered finish (Rusts like a biatch) but my mate who has the same setup as me has a chrome pipe and the header pipe has gone blue.

It will eventually work its way further up the header pipe towards the expansion chamber where it will stop because theres not enough heat in the expansion chamber.

Nothing to worry about.

And if it does rust off, Get a new zorst

They arent that expensive...

<|Ben|>


[edit] Oh shit, Forgot uve got a SF 100 [/edit]

[Mr C]

pah

my pipe glows cherry red all the way from the headers to the can if I leave it running and not moving

Titanium see and only about a mil thick



it's gone a luvverly blue gold colour now
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187.3bhp = 201mph

[TheShaggyDA]

[robboadd]

Is this blueing or is rossi just being a tart?

[Mr C]

looks the same as mine

= Titanium
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187.3bhp = 201mph

[Adam_P]

Steel ones look like this if you leave something running long enough.
____________________
Colin McRae MBE 1968 - 2007 RIP
Orwell Rolls in his Grave
God is imaginary

[Mr C]

hehehehe

that's the way
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187.3bhp = 201mph

[Adam_P]

That's just the warm up to get the bloody water temperature up about an hour before a race. Apparantly they turn translucent when they thrash the shit out of it on the dyno when it's been rebuilt.

It's a bit blurry as it's fookin hot leaning over the back of the car when they're like that!
I'd like to get a snap of them after it comes in after a qualifying run, but I'd never get near the engine bay quickly enough to see them at that sort of heat.

Saw the turbo's on a Porsche 935 glowing almost white during the evening race at Bahrain though, kept us in hysterics every time it came past the pit wall in the dark!
____________________
Colin McRae MBE 1968 - 2007 RIP
Orwell Rolls in his Grave
God is imaginary