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Offline Paul2bikes

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #10 on: 08 March, 2019, 10:32:44 AM »
*Originally Posted by Timbox [+]
You can see it in his first pic, 8mm ish Bar holding top part of the headers together

Gotcha, it's a length of flimsy thin wall tubing, tack welded to each header pipe. I'd guess just there to hold headers in position before fitting. The headers will have been welded in a jig at manufacture & hopefully stress relieved.
The greatest deception men suffer is from their own opinions.
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Offline Tigras1050

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #11 on: 08 March, 2019, 06:01:24 PM »
Actually it was TIG but the welding job doesn't look to be very good for me. I've done it at some custom car exhaust place.
I don't think it was under any stress. Welder said it's because of the heat. Maybe cheap metal?
I've ordered s/h downpipes- now is a  chance to do a de-cat.



Offline Paul2bikes

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #12 on: 08 March, 2019, 07:11:37 PM »
*Originally Posted by Tigras1050 [+]
Actually it was TIG but the welding job doesn't look to be very good for me. I've done it at some custom car exhaust place.
I don't think it was under any stress. Welder said it's because of the heat. Maybe cheap metal?
I've ordered s/h downpipes- now is a  chance to do a de-cat.

Hmm, doesn't look like TIG which is more controllable than MIG. We do see the odd badly corroded Triumph headers on internet forums. They are a grade of stainless steel but some appear to deteriorate more like mild steel. I wonder, is it a bad batch of material or if it's the cleaning solution that has been used by some people on them over the years. Chlorine attacks St/St.

I have had trumpets for the past 25 years without experiencing this corrosion..... up to now. I also have a '95 Yam with a St/St header, still in good condition.

Good luck with the s/h headers.
The greatest deception men suffer is from their own opinions.
Leonardo da Vinci

Offline tiggersteve

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #13 on: 08 March, 2019, 10:06:53 PM »
yep looks like mig but also badly done Tig,A crap job I'm afraid looks to be no weld prep what so ever and
If it was Tig which is  carried out in a shroud of gas then he would have had to have a secondary gas supply internally to maintain the protective shroud,
as Paul said braze would have been a better option different colour but wouldn't have been that noticeable behind the rad

Offline Tigras1050

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #14 on: 08 March, 2019, 10:17:52 PM »
And how do I go about brazing?
Bronze rod and blow torch? Never done it, but I can bet I could do a better job..

Offline Tigras1050

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #15 on: 08 March, 2019, 10:34:16 PM »
Plenty videos on Youtube. I'll watch them and possibly give it a try. Never too late to learn something new.

Offline ZuluTiger

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #16 on: 08 March, 2019, 11:06:33 PM »
Brazing is like 'glueing' metal. It runs a brass coating into the gap. Good for low heat applications. Here's the rub. NEVER try and go back and weld anything you've brazed or you will have splatter and drama like you would not believe. The bottom line is that you should try and stick to a homogenous medium if possible. TIG and MIG have given us better options than brazing. I use it because it's cheap and I can own a torch to cut and weld (torch welding is just fusing metal, but takes a bit of practice) but brazing is a one-time deal. Beware.

Offline Tigras1050

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #17 on: 09 March, 2019, 12:07:51 AM »
Thanks for the tips Zulu.
I imagine butane torch is too weak to braze?
And the rod should be silicone bronze?

Offline ZuluTiger

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #18 on: 09 March, 2019, 12:18:40 AM »
Butane is good for solder. A quantum drop in heat. Brazing is in the realm of oxy-acetylene. Silver solder is what I used at this level. Please chime in, good fellows.

Offline Paul2bikes

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Re: Wanted: Mk1 Tiger 1050 headers downpipes
« Reply #19 on: 09 March, 2019, 07:58:45 AM »
*Originally Posted by Tigras1050 [+]
Thanks for the tips Zulu.
I imagine butane torch is too weak to braze?
And the rod should be silicone bronze?

Brazing needs the power of oxy/acet, 875c IIRC. Needs be clean metal & done by a qualified welder anorl to float it over the surface of the affected area. Not worth throwing a lot of dosh at those headers. A mate in a Fabrication shop is what you need.
The greatest deception men suffer is from their own opinions.
Leonardo da Vinci