is this a restriction?

[Dan14]

took of my exhaust on my wk sp250 and theres a pipe inside the exhaust pipe, is this needed ? or a restriction? 

[Mississippi Bullfrog]

It looks more like the actual exhaust pipe itself - the outer ring is probably part of the structure of the flange.

[Gerontious]

Pretty much the same on my 1000cc

[Tiggie]

I'm not an expert in them but the restrictors I've seen in exhausts have always looked like a washer with a hole maybe 1.5cm ish in diameter.

 

Even if that was a restrictor (which I doubt) it wouldn't be restricting much 

[iangaryprice]

Its probably the "double skin" structure of the pipe. The front part of the exhaust pipe is often 2 layers, it reduces the outside temerature of the exhaust. On chrome exhausts it helps to redcue the "blueing" of the header pipes. Dont usually find double skin exhausts on 2 strokes - they run much cooler and don't need it.

[Dan14]

thanks for your help guys, feel a lot better about it now as i thought it would be some kind of restriction.