How to fix dents in exhaust?

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1/12/2012 7:24 AM

I have an rm 250 2 stroke with an fmf fatty pipe. The pipe has a few dents on the left side of the bike. Heard of guys heating and pressurizing to "pop" the dents out. Is this the best way to get the dents out? Procedures and tricks? Thanks.

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1/12/2012 7:32 AM

Depends on how bad the dents are. Old school method, put some water in exhaust,not full,lay it in freezer,dents gone, magic,lol, or drill a small hole in center of dent, get a spring puller and pull dent out, then weld small whole, good luck.

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1/12/2012 7:33 AM

Pics?

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1/12/2012 7:47 AM

mxb2 wrote:

Pics?

Will post some pics.

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1/12/2012 7:48 AM

Actually, if you go to my profile and click on the pic in my avatar you can see the 2 dents.

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1/12/2012 11:33 AM

I dented my header pipe on my crf 450 abuot 2 years ago.. I popped them out with the water and freezing the pipe.. You got to be careful you dont let it sit in there to long.. The ice will crack your pipe if you over fill it or leave it in too long. I left mine in about 8-10 hours.

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Kevin Windham, The man, the myth, the legend! Gonna miss seeing this man on the line.

-----Do or Do not, There is no try-----

1/12/2012 1:20 PM
Edited Date/Time: 1/12/2012 1:20 PM

Mx4life320 wrote:

I dented my header pipe on my crf 450 abuot 2 years ago.. I popped them out with the water and freezing the pipe.. You got to be careful you dont let it sit in there to long.. The ice will crack your pipe if you over fill it or leave it in too long. I left mine in about 8-10 hours.

Yes don't go to the neighbors and a few too many, you'll be pissed when the pipe is split!!

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1/12/2012 2:51 PM

Mx4life320 wrote:

I dented my header pipe on my crf 450 abuot 2 years ago.. I popped them out with the water and freezing the pipe.. You got to be careful you dont let it sit in there to long.. The ice will crack your pipe if you over fill it or leave it in too long. I left mine in about 8-10 hours.

what do you use to cap the ends? Just curious.

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1/12/2012 4:13 PM

Old innertube and hose clamp.

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1/12/2012 8:41 PM

I put a plastic bag over the top and a rubber band..

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Kevin Windham, The man, the myth, the legend! Gonna miss seeing this man on the line.

-----Do or Do not, There is no try-----

1/13/2012 10:41 AM

Whatever you do, do not fill it with water and freeze it. I saw one after the bozo did it. Swole the whole pipe up, cracked the welded seam and distorted the pipe to where it wouldn't fit back on the bike. Think about it, where the dent is will probably be stronger than the undented area around it.

Plugging, pressurizing and heating could go way wrong real quick. There are places that do that for a minimal charge.

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1/13/2012 10:51 AM
Edited Date/Time: 1/13/2012 10:52 AM

Or try ebay, craigslist for a pipe, best option buy a new pipe. save the headaches.The dents do not look that bad to hinder the power?

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1/13/2012 11:05 AM
Edited Date/Time: 1/13/2012 11:15 AM

Yeah, may have to pick one up off fleabay. I was sitting here thinking, if I freeze this thing I guarantee it will not turn out real good! So, what pipe do the experts recommend? This pipe is the fmf gold series fatty, is the Gnarly pipe from FMF good too?

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1/13/2012 11:17 AM

RMRider1 wrote:

Yeah, may have to pick one up off fleabay. I was sitting here thinking, if I freeze this thing I guarantee it will not turn out real good! So, what pipe do the experts recommend? This pipe is the fmf gold series fatty, is the Gnarly pipe from FMF good too?

fmf,pro circuit, all good stuff, yea evilbay might have some deals, or creepslist, aka craigslist. lol

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1/15/2012 7:07 PM

newmann wrote:

Whatever you do, do not fill it with water and freeze it. I saw one after the bozo did it. Swole the whole pipe up, cracked the welded seam and distorted the pipe to where it wouldn't fit back on the bike. Think about it, where the dent is will probably be stronger than the undented area around it.

Plugging, pressurizing and heating could go way wrong real quick. There are places that do that for a minimal charge.

We charge $60 to totally repair & clean your pipe. Check us out at FusionOneUSA.com
Using the pressure & heat technique is very effective, but very dangerous if you do not take the proper precautions and use the correct safety gear. An exploding pipe can severely injure you and wreck your pipe. Give a call at 860-992-4377 for details..... Regards, Joe.

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