dented exhuast pipe

**Thu Sep 29, 2005 3:00 pm » Post: #1 » Download Post**

hi all...

my problems just never seem to end. Mad

one of my exhaust pipes has two dents in it....i think it happened when the previous owner crashed it...

how would i go about takin them out?

cheers
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Philip Ahn
MC21 NSR250R

im poor...

**Thu Sep 29, 2005 10:33 pm » Post: #2 » Download Post**

Are they the stock chambers Biatchy? If they are I wouldnt be particularly worried about it as you'll be wanting to swap them over for a set of race chambers after you've come for a ride with the rest of us Melbourne guys Wink

**Thu Sep 29, 2005 10:56 pm » Post: #3 » Download Post**

bryan_au wrote:Are they the stock chambers Biatchy? If they are I wouldnt be particularly worried about it as you'll be wanting to swap them over for a set of race chambers after you've come for a ride with the rest of us Melbourne guys

LOL, but on a serious note there's nothing wrong with the stock '21 chambers, Bill's seen 66bhp out of his Surprised

No dents in his though.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread

**Fri Sep 30, 2005 12:30 am » Post: #4 » Download Post**

yeah they are the stock ones...

they are quite small dents...maybe 10mm diameter circles...5mm deep..

i just that maybe cos the shape of chamber is so important it could have an effect on the engine...

dont want another seizure or nuthin... Crying or Very sad

i heard you can weld a rod or sumthin like that to the dent and then using a machine or sumthin to pull it out?

Smile

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Philip Ahn
MC21 NSR250R

im poor...

**Fri Sep 30, 2005 1:00 am » Post: #5 » Download Post**

what u can do is plug up one end then pressurize the other and heat the dents with a tourch. they should pop out once hot enough
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94 mc28 SE

**Fri Sep 30, 2005 1:40 am » Post: #6 » Download Post**

cool....

thanks fstnsr...

what could i use to pressurise it?
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Philip Ahn
MC21 NSR250R

im poor...

**Fri Sep 30, 2005 2:34 am » Post: #7 » Download Post**

compressed air or even if u block both ends as it heats the air shold expand and create a preasure.
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94 mc28 SE

**Fri Sep 30, 2005 9:05 am » Post: #8 » Download Post**

If there stock dont worry

They have a second skin for noise regs so it will not affect performance, I know cause I cut my stock pair apart years ago, and also its real thick stuff so not like you could pop down your local moto x shop and get them to tap it out its what most do all day long.
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Farting is funny

**Fri Sep 30, 2005 1:43 pm » Post: #9 » Download Post**

fstnsr wrote:what u can do is plug up one end then pressurize the other and heat the dents with a tourch...
biatchy wrote:what could i use to pressurise it?
fstnsr wrote:compressed air or even if u block both ends as it heats the air shold expand and create a preasure.

Using compresed air is extremely dangerous, as the pipe can explode. Any pipe builder worth his salt would most likely use hydraulic pressure - probably oil - but it's not a job to be undertaken lightly.

Send a PM to "martin77" and ask him - he'll be building our race pipes soon.

Like a few of the guys have said though, if they are stock pipes then I wouldn't worry too much as it's probably only the outer "skin" that's dented anyway.
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Andy.
NSR-WORLD.COM

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**Sat Oct 01, 2005 12:57 pm » Post: #10 » Download Post**

cool...thanks guys..

yeah i was just worried it woul effect the performance drastically...
guess not Smile

cheers
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Philip Ahn
MC21 NSR250R

im poor...