Pulling header dents.... - Wrist Twisters
 
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post #1 of 5 Old 10-26-2013, 08:01 AM Thread Starter
Ian
 
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Pulling header dents....

So I pulled off my 919 header to freshen it up. Its a 2bros 4-2-1 900rr header made from mild steel.

I found a dent on one of the collector tubes, where it turns aft under the oil pan. I figure its from when I got hung up on a ramp while moving it into storage last year.

Because of the location you can't back it up to knock it out. So maybe tack weld a nail & slide hammer?

Anyone have any tips or tricks for pulling/ popping the dent? Ideas....

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post #2 of 5 Old 10-26-2013, 08:34 AM
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post #3 of 5 Old 10-26-2013, 08:36 AM
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I've heard of people putting water into the pipe and then freezing to push it out. A couple of freeze / thaw / refreeze cycles would be needed.

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post #4 of 5 Old 10-26-2013, 09:01 AM
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plug the four inlets with some sort of fabricated plates and then make a fixture for the other end with a Schrader valve so you can put 1 to 2 psi of air
pressure in the pipe. slowly heat the dented area with a torch. the dent
should be pushed out. just be sure you don't heat it too long or you relieve
the pressure between subsequent heat cycles. I have done this numerous times on pipes on my dirt bikes with good success.

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post #5 of 5 Old 10-26-2013, 09:31 AM Thread Starter
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Quote:
Originally Posted by mx463 View Post
plug the four inlets with some sort of fabricated plates and then make a fixture for the other end with a Schrader valve so you can put 1 to 2 psi of air
pressure in the pipe. slowly heat the dented area with a torch. the dent
should be pushed out. just be sure you don't heat it too long or you relieve
the pressure between subsequent heat cycles. I have done this numerous times on pipes on my dirt bikes with good success.
This should do it! Thanks man, updates to follow.

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