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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Restrictor in front pipe.
Post Info TOPIC: Restrictor in front pipe.
Markvan


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Restriction taken out of header end.
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image.jpg

2007 auzzy model. Guy i bought it of said it was completely orginal. He had bought

it new and 

done no mods. Air box is standard. its abit hard to tell from the photo but it does 

look as if its been cut.  It doesnt seem to have a nice factory cut. Wondering if any other auzzy ttr was bought 

new with no restrictor. 



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 Tweed heads Australia. 
Markvan


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image.jpg



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 Tweed heads Australia. 
brindabella


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I got my AU model brand new AND in the crate, exactly as it arrived from Japan, and put it together myself.
I didn't look at the header right away, thinking I might cut it after sorting the jetting for our altitude.

I never did cut it, and it seems to go ok - it can't be much of a restrictor.
[I think I even came across a claim somewhere that retaining the "header restrictor" actually improved low down torque!]

Interestingly, the bike shop guy where I bought it said they cut the header back a little as a matter of course on any TTR250 that they sell.

So quite likely the previous owner is being truthful when saying no modifications AFTER PURCHASE AND PRE-DELIVERY.

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ERBS


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exhaust restriction
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i was wondering whether to just use a dremmel to take out the restriction rather than cutting of a bit of the header pipe

is the restrictor soft metal or is it stainless like the exhaust?



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ttboof


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id go with cutting the pipe there is plenty of length and its quick/easy .

 



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Terrence R


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Header restrictor.....
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I thought that I would remove my muffler to find that restrictor at the end of the head pipe, but I just don't see it. Was it already removed? I doubt it cause the bike is literally currently all stock with zero mods. it looks clean in there, like know one was in there with a grinder, unless they did an amazingly clean grind job. Do any of u guys hav a pick of a header with the restrictor still intacked? Thanx.



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chrisstdt


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If you cant see it when looking from the end its been taken out ,you can also take them out with a dremel and not touch the end of the pipe with a grinder

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Markvan


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i have a 2006 auzzy model. bloke i bought it of said he did no mods But my restrictor was out. Someone said the dealership may hav removed it. There are photos on here if you search ( header pipe ) or ( restrictor).  or even ( uncorking a TTR ). 



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 Tweed heads Australia. 
TT-R250M


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The US TTR250 header pipe does not have a restrictor fitted from factory. Only AU/UK etc.

That was an easy one. biggrin

Jarrah



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Terrence R


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TT-R250M wrote:

The US TTR250 header pipe does not have a restrictor fitted from factory. Only AU/UK etc.

That was an easy one. biggrin

Jarrah

 

 

Lol. That certainly explains it. Thanx.



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TT-R250M


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Terrence R wrote:
TT-R250M wrote:

The US TTR250 header pipe does not have a restrictor fitted from factory. Only AU/UK etc.

That was an easy one. biggrin

Jarrah

 

 

Lol. That certainly explains it. Thanx.

 No problems. wink

Jarrah



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Hp


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exhaust restriction removal
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Nice simple question 

 If I remove the restriction in the header pipe and thats it no other mods, do I have to re-jet the carb ? and would I notice any difference ?



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TT-R250M


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No need to re-jet but you may want to lower the jet needle clip position (towards the sharp end) but it is not necessary. Removing it won't change the air-flow much.

Can't say whether or not you will notice the difference as I have only seen the restrictor on this site.

Jarrah 

 



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andy m


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Restrictor in front pipe.
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Looking at a std front pipe at the tail end of it appears to be a restrictor. Has anyone cut theirs out ??



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TT-R250M


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Hey Andy,

All info needed is in the FAQ HERE.

This is what the restrictor looks like (hope Brian doesn't mind?)-

detail+of+restrictor.jpg

To remove it cut the last 10mm from the header and it will come off with it. More info here- http://www.ttr250.com/#exhaust

This is Markvan's picture of his header pipe that has had the restrictor removed, hope he doesn't mind?

 image.jpg

 

Jarrah



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