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Sherco help for a newbie


bluegnu
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15 hours ago, bluegnu said:

Can anyone tell me why the exhaust header pipe I just got on a well-known auction site has a narrow neck where it joins the cylinder?

First I thought it was from a smaller CC, but looking at other ones online I've seen them advertised from the 290cc. My bike goes well with it on but will it overheat?

 

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It will be an insert that is normally fitted for use on 125s, see if you can remove it as it will have an effect on a 290

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On ‎7‎/‎7‎/‎2017 at 10:14 PM, tony27 said:

It will be an insert that is normally fitted for use on 125s, see if you can remove it as it will have an effect on a 290

Early 125 pipes were made small and did not require an insert. It is ona them!

 

Edited by copemech
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Is it likely to be damaging on a 250cc engine do you think?

It doesn't appear to be an insert, more like the whole neck is narrow.

Here's what the two exhausts look like side by side - my old 2.5 exhaust (left) and the narrow on the right:

 

 

IMG_2059.JPG

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