Shineray XY250GY-2 MX Exhaust Upgrade

There is alot of hp/kw to gain threw an aftermarket exhaust system. So being a China Moto this makes things very hard in this area.
So what i have done is bought a couple of exhaust pieces and im going to pass them and the bike onto my cousin who owns a car exhaust shop. (Im pretty lucky).
So what i did was take off the old exhaust.


Attachment 18893

Now i studied this for hours and came up with that this looks very much like a CRF450 front header like this.

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I bought from ebay for $180.00 delivered.

I new my frame was a ktm type so i bit the bullet and bought a lexx tail pipe.

Attachment 18895

So by the end of the week it should be back together and finally a dyno run.

So the front header pipe needs cutting and shutting and the tail pipe needs a mid pipe that will get built and the tail pipe was $344 delivered.

Droped past my Cousins business The Garage to check my bike out. Very close to finnished.



Attachment 18901



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So happy with progress so far.

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Quick plug if any one wants car exhaust, transmission, dyno tunning anything car performance done call adam at
The Garage or facebook him.

Attachment 18919

Almost finnished woop woop



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i have put following muffler on:

Attachment 18929


https://item.taobao.com/item.htm?spm...u=p1mbv2am479a

But as it was on longer ride annoying loud I put now a DB killer in. Still people turned their head :-)

Hey mate, i was wondering how loud it was going to be but this is going to be a race bike so im not too wworried i just hope it gives more power.

The above shown is nothing but a pipe with diameter larger than the bended front pipe. No other interior in the muffler. It has a nice dark sound and especially with my 300cc kit it helps to breath freely.
Surprisingly the fuel consumption didn't increase

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Oh ok i used mandrell bent stainless steel. Cant remember what size but it was bigger and better flow.

Quote:

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Originally Posted by ShuBen

The above shown is nothing but a pipe with diameter larger than the bended front pipe. No other interior in the muffler. It has a nice dark sound and especially with my 300cc kit it helps to breath freely.
Surprisingly the fuel consumption didn't increase

Sent from my HUAWEI P7-L07 using Tapatalk

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Is that 300cc kit for the X2? If so, do you have a link or how you did it? I'd definitely be interested in that.

In TaoBao you can find the necessary parts. At the moments seems to be a shortage of 300cc heads in the market. So they got very expensive. I have still a modified 250cc head. I increased the inner diameter a little by lathe and revised the cooling channel by grinding to smoothen the flow. But its still unused in my garage as I have a 300cc head on already. But I would love to try it out.

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