fixing a bent header?

25 replies to this topic
  • Guest_Guest_*

Posted May 18, 2001 - 05:44 PM


I used o2/acetaline
and it does get verrrrry hot
just b carefull with the pressure.
we tried propane and it just did not get hot enuf.
I have a Noleen header and my freind that this jig belongs to has the T-4 setup front to rear.
Yes I think that they are thicker by quite a bit.
Maybe just needs to be hotter with less air psi.
We used between 75psi and 80psi

[This message has been edited by g4racing (edited 05-18-2001).]

  • motoman393

Posted May 18, 2001 - 06:12 PM


Well that makes sense, thats what I was thinking was it wasnt hot enough! Since Acetiline is much more expensive we will be going to a welding shop with our jig tomorrow to get it straightened out. Thanks for your help!


I get my kicks on a 2001' YZ426!
Friendswood, TX

  • motoman393

Posted May 19, 2001 - 06:17 PM


Well my header turned out is no longer a HUGE crease but now a little line. Another 10 more mins and I could have gotten it perfect, but I didnt want to use all of my friends oxyacetiline (even though it was a very large tank)! I used about 60-70 PSI of pressure in my header and it worked great, it took a total of 20 mins! Man that stuff burns hot, I was wearing welding gloves and it still was like an oven ,it also was in a hot barn (gotta love the TX weather right? LOL)

I think as long as you keep the bead of the flame (the neon blue tip) about 4 inches away from the header at all times and move it around will not blow a hole in your header! Well I appreciate all your tips and suggestions! Thanks,


I get my kicks on a 2001' YZ426!
Friendswood, TX

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • motoman393

Posted June 20, 2001 - 10:07 AM


Just to let you guys know I put up a procedure and pics on how to fix your header on my website! Click HERE to goto the "how to fix your header page" just letting you guys know, there is a lot of new guys on this BBoard and they may have this problem too! Later,


I get my kicks on a 426!
Motoman393's MX Site

  • ExhaustWorks

Posted June 20, 2001 - 07:39 PM


Hey! Here's your LOW COST ALTERNATIVE!$26.00 per pipe for 1985 and newer exhaust's.

.............................................<IMG SRC ="">

[This message has been edited by ExhaustWorks (edited 06-20-2001).]

  • bjscheel

Posted June 28, 2001 - 08:44 PM


i have a 98 400f with a fmf header and pipe. I had exhaust works fix my smashed header it took only a day and you can't even tell it was ever bent or smashed. The best part was there was no discoloration.
I highly suggest trying him.

Related Content


Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

BIGBORE FOR YZ450F 2006? by Taattie94

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 3 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.