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Cracked Exhaust

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I haven't been on here or a while,just saying in case any of you are wondering.Ill give you the quick run down.my brothers friend came out to use our tools, and somebody has to be with him, so i was elected. I decided then to take my motorbike apart. When i took the plastic cover off, i found my exhaust was cracked. At least it looked like it, but it was at the very end, wouldn't it crack where its hotter, by the engine more?

Picture below

ImageUploadedByThumper Talk1398312531.828636.jpg

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Not a very clear pic, but looks a bit like a auto muffler will when you shut the ign off coasting down a hill..............then turn it back on! 

Or...........when some borrows your bike and crashes bending the exhaust, then bends it back hoping you won't notice! ;)

 

Old School Al

Edited by Old School Al

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Thx, i asked my brother and he said its stock?

I dont know y they would have a stock crack, but could u explain your first post a bit more, thank you

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Your brother is correct, it is just how the pipe is made, there is a piece of steel that is welded to the pipe and the can to reinforce that area, no exhaust gasses will leak...here is a picture of my 2010 crf100f perfectly normal exhaust that looks just like yours!WP_20140424_003.jpg

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There would be soot on the backside of the side panel if it was cracked, and it would be loud.

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Yes.

The large canister that the exhaust pipe goes into

is a "muffler". It may have a series of passage ways

or maybe just a tube with a series of holes along the

sides. It may also have some high temperature fabric

(similar in appearance to house insulation).

The hot exhaust gases travel from the engine down

the header pipe at high velocity. If the pipe ended

where the gusset that drew your attention is, then the

speed and pressure of the exhaust gas pulses would

create loud popping sounds as these exit the pipe

into the atmosphere.

The muffler provides an enclosed volume for the gas

pulses to expand into and lose some of their pressure

energy before reaching the atmosphere. Instead of

short high energy pulses bursting out the pipe, gases

at lower pressure flow out of the end of the muffler over

longer duration with less resulting noise.

Edited by EddyCurr

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oh ok, so the "muffler" acts like a catalytic converter almost, like on car.So if i would like to have more flow i could take this out, and make it go a "alittle" bit faster.Iv done it before, sounded like a 2 stroke.i have a question to go with that.Why when i did that, did i have to run with the choke half on, with it off it just died.not enough back pressure?

Edited by joeyschmo101

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oh ok, so the "muffler" acts like a catalytic converter almost, like on car.

 

No.

 

A catalytic converter contains material that reacts with hydrocarbons,

carbon monoxide and nitrogen oxides present in the exhaust, 'catalyzing'

these harmful byproducts into less harmful forms.

 

A muffler reduces the noise or decibel level of the exhaust.

 

 

 

So if i would like to have more flow i could take this out, and make it go a "a little" bit faster.

 

No.

 

If the muffler is removed, the exhaust note will be louder.  The louder

sound may make the bike seem faster, but it almost certainly will NOT

be faster - more likely, the engine will be less powerful and may possibly

run hotter.

 

The louder the bike, the fewer places you will be welcome to ride it and

the fewer the number of places the rest of us will be welcome to ride our

bikes.  Park Rangers may put a stop to riding because it no longer has

a spark arrestor.

 

The more chopped up the bike, the less it will sell for when you realize

you don't ride it much anymore because of how much noise it makes, how

poorly it runs and because of the unhappy stares you get from neighbors.

 

If you want to go faster, take care of this bike while you learn how to ride.

Then sell this bike for a good price and get a more powerful bike.

  • Like 1

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Oh, I new that, but if you would like to go faster in a car, u take the cat. Out , because of the restriction.I mean in that sense, they are similar.Not trying to be smart a$$⬆.Does the same law apply for motorbikes?And can you get a "catalytic converter" for your motorbike?i know you wouldn't want that, but just wondering.

Thx for all the replies !

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Looks like I am the victim of a troll. This can not be

someone legitimate.

Removing a catalytic converter makes a car go faster ?

Sheeesh ....

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No, ur not a victim of a troll, i guess someone just really dumb then.thx.and yes, im almost 100% sure that it does make it faster, because of less restriction. First mod you do, when modifying a car, is get a mid pipe

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Well, I stand corrected.

 

When someone genuinely does not know, there are no dumb questions.

(However, there is NO shortage of dumb answers.)

 

While it might be tempting to respond to what you have heard about the
first mod you do when modifying a car, that would take us further off topic
in this subforum for matters regarding Honda XR/CRF 80-200 motorcycles.

 

It seems safe to say that your original concern about the gusset at the joint
where the exhaust header terminates into the muffler has been addressed.
 

If you have any other questions about your bike, don't hesitate to whip up
a new thread with an appropriate title and a description of what is on your
mind.

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