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Old August 13th, 2020, 07:45 PM   #1
Kev
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Name: Kevin
Location: Penang
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Motorcycle(s): 2012 EX250

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Exhaust compatibility

Hi, I'm looking to get a new full exhaust system for my 2012 model, but I'm a bit confused about what to look for. I see lots of ads for the 2013-2018 model, and only a few for the 2008-2012 model (I'm not sure what the naming convention is).
I have also seen a couple of ads which claim 2008- 2018 compatability.
Are the exhaust system dimensions and mounting points the same between these two models?
Thanks in advance.
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Old August 14th, 2020, 05:58 PM   #2
DannoXYZ
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We don't have much experience with post-2012 250s since those never arrived in U.S. What has been done is installing 2013-2018 Ninja 300 exhausts onto 08-12 250s and it does work. The hanger bracket is in slightly different location, but header-flanges fit.

So I suppose 2013-2018 250 exhaust is probably similar to 2013-2018 300 exhaust. Try asking folks at Tyga, they really know their stuff when it comes to exhaust. I'd recommend purchasing full exhaust from them. They've gotten highest power-gains out of all aftermarket exhausts from dyno-charts I've gathered.

For best gains, you'll also want to re-program ECU maps. Factory maps are very rich (not as rich as carbs), so even with exhaust upgrades, you'll want to adjust high-end/WOT mixtures to be in most-powerful 13.5:1 AFR range.
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Old August 15th, 2020, 10:17 PM   #3
Kev
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Name: Kevin
Location: Penang
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Motorcycle(s): 2012 EX250

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Quote:
Originally Posted by DannoXYZ View Post
We don't have much experience with post-2012 250s since those never arrived in U.S. What has been done is installing 2013-2018 Ninja 300 exhausts onto 08-12 250s and it does work. The hanger bracket is in slightly different location, but header-flanges fit.

So I suppose 2013-2018 250 exhaust is probably similar to 2013-2018 300 exhaust. Try asking folks at Tyga, they really know their stuff when it comes to exhaust. I'd recommend purchasing full exhaust from them. They've gotten highest power-gains out of all aftermarket exhausts from dyno-charts I've gathered.

For best gains, you'll also want to re-program ECU maps. Factory maps are very rich (not as rich as carbs), so even with exhaust upgrades, you'll want to adjust high-end/WOT mixtures to be in most-powerful 13.5:1 AFR range.
Thanks Danno, this is exactly the I formation that I am after. Yes, planning on getting it on a dyno and getting ECU remapped when the new exhaust is fitted. I'll see what Tyga say. Thanks again.
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