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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> WHILE I'M AT IT....?
Post Info TOPIC: WHILE I'M AT IT....?
aussiedeuce


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WP_20151221_01_08_37_Pro.jpgHi all,

 

I've got the bike stripped-down at the moment after a close call out bush caused by the carby. On my first real ride no less. Thirty seconds into it.

 

Anyway I was wondering if anyone had any suggestions about what I should be looking for or fixing /modifying while I have the bike apart?

 

Cheers.



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aussiedeuce


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WP_20151221_002.jpg

WP_20151221_001.jpg

 

Also does anyone have a suggestion of what to do with this ugly thing? (the rusty exhaust pipe)



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Moo


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Is it rotten through? Or solid enough to be cleaned up?

It's a straight through so will give more power then the original exhaust header. The original ones have a big u-bend at the front.

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aussiedeuce


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WP_20151221_003.jpg

 

It's still solid enough to be cleaned up fortunately. Only problem is a cracked off weld, pictured, which I can fix when I can get hold of a welder. I'm really just wondering whether I should try and polish it up or maybe coat it once I've sanded it back.



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TTRfan


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Is the header stainless steel underneath the crud? If so it's probably a Totally TTRs one as the CRD version didn't have the fixings for the exhaust guard.

The quickest way to clean up a stainless pipe is to use brick acid - honestly biggrin

Regarding the exhaust itself, best to give it a good wire brush before welding just to check that it hasn't rusted through elsewhere.

Brian



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aussiedeuce


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WP_20151221_005.jpgWP_20151221_006.jpgWP_20151221_005.jpgHi Brian, thanks for the reply. No it's mild steel, by the looks, from the exhaust port until the bend just after the battery box. I think it might actually be a bit of a 'chop and change' now that I have looked at it a bit closer. I'll post some more pics to explain what I'm talking about.

Also, yes I will wire brush the whole pipe regardless.



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aussiedeuce


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Hi Brian,

I think you might be right regarding the exhaust system, I think it is stainless steel like you suggested. I am still surprised as I've never seen stainless steel in this sort of condition.

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nelly


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if a magnet sticks to it its not stainless

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aussiedeuce


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There are several different types of stainless steels. The two main types are austenitic and ferritic, each of which exhibits a different atomic arrangement. Due to this difference, ferritic stainless steels are generally magnetic while austenitic stainless steels usually are not.

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nelly


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fair enough ,I was only trying to help

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aussiedeuce


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Lol, very sorry, nelly. I appreciate the reply. I actually tested my exhaust with a magnetic screwdriver. My reply to you was just a copy and paste from a Google search, sorry if I sounded rude.

Sam.

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nelly


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lol
I just thought you were one of them geeky dudes trying to fill me head with jargon that I don't need nor understand.........
no worries bud

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aussiedeuce


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Lol, nope, I don't think so.

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aussiedeuce


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Sooo.... While I'm at it..... I spent five solid hours rubbing back the rust from my stainless steel exhaust. Stripped-down the back part of the frame so I could check for rust and clean up and cover the wiring. I'm glad I did because there was some rust that was starting to take hold - well if it had been left any longer. So I have hit it all with a flap disk on the grinder and am about to spray etch primer, tap the threads of the nuts in the frame so that they are all good. Then wire it back up.



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aussiedeuce


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Ps that exhaust isn't finished yet, lol.

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