Exhaust Header Mod - Hawk 250

ManOfSteel · 08-26-2020, 08:35 PM

So I had the catalytic converter removed from my exhaust header, and the muffler shop welded it all back together for me. I’ve painted the outside with fireproof paint, but my question is won’t it still corrode from the inside out? Especially where the root of the new weld is exposed bare metal? How corrosive are exhaust gases? Is this something I need to concern myself with? What has everyone else done?

aaw611 · 08-26-2020, 10:25 PM

I was worried about this on my bike for a bit. I just finally came to terms with the fact that by the time the exhaust completely rusts away, I probably won't have the bike anymore. If I do still have the bike, I'll just buy an ebay exhaust.

**JerryHawk250** · 08-27-2020, 08:07 AM

My Hawk is going on 4 years old. No problems with mine rusting out.

aaw611 · 08-27-2020, 09:16 AM

How much surface rust do you have Jerry? My Hawk is only a couple months old and I have some pretty good pitting and surface rust on the header bend. Is that normal?

**JerryHawk250** · 08-27-2020, 09:41 AM

Quote:

Originally Posted by aaw611

How much surface rust do you have Jerry? My Hawk is only a couple months old and I have some pretty good pitting and surface rust on the header bend. Is that normal?

I've painted mine with a good high temp paint when i first did the cat removal. The original paint was kind of light. If you get a good heavy coating on it it will be easy to keep up. I repaint it at least once a year.

aaw611 · 08-27-2020, 04:01 PM

Great. I'll have to do that when I get a chance. Mine started rusting as soon as I got it.

ManOfSteel · 08-29-2020, 02:40 PM

My thought was that after welding it back together the bare weld on the inside is exposed to exhaust gases, a major component of which is vaporized water. I suppose if the corrosion rate is relatively slow it’s probably not a big deal.

08-26-2020, 08:35 PM	#1
ManOfSteel Join Date: May 2018 Location: Utah Posts: 10	Exhaust Header Mod - Hawk 250 So I had the catalytic converter removed from my exhaust header, and the muffler shop welded it all back together for me. I’ve painted the outside with fireproof paint, but my question is won’t it still corrode from the inside out? Especially where the root of the new weld is exposed bare metal? How corrosive are exhaust gases? Is this something I need to concern myself with? What has everyone else done?
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08-27-2020, 08:07 AM	#3
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,707	My Hawk is going on 4 years old. No problems with mine rusting out. __________________ 2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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08-26-2020, 10:25 PM	#2
aaw611 Join Date: Jun 2020 Posts: 48	I was worried about this on my bike for a bit. I just finally came to terms with the fact that by the time the exhaust completely rusts away, I probably won't have the bike anymore. If I do still have the bike, I'll just buy an ebay exhaust.
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08-27-2020, 09:16 AM	#4
aaw611 Join Date: Jun 2020 Posts: 48	How much surface rust do you have Jerry? My Hawk is only a couple months old and I have some pretty good pitting and surface rust on the header bend. Is that normal?
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08-27-2020, 04:01 PM	#6
aaw611 Join Date: Jun 2020 Posts: 48	Great. I'll have to do that when I get a chance. Mine started rusting as soon as I got it.
	1

08-29-2020, 02:40 PM	#7
ManOfSteel Join Date: May 2018 Location: Utah Posts: 10	My thought was that after welding it back together the bare weld on the inside is exposed to exhaust gases, a major component of which is vaporized water. I suppose if the corrosion rate is relatively slow it’s probably not a big deal.
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