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Ninja 250 Exhaust

12K views 19 replies 18 participants last post by  Rosso 
#1 ·
Ok, I have a pretty broad question, so here goes nothing.

I recently bought a 2012 Ninja 250 early release from the dealer. I've been making a list of modifications I'd like to do to it, and one of them, is a new exhaust, preferably a slip on. Now, I'm not going to put the exhaust on until after 1,000 miles because I'm waiting till the motor is more "broken in."

Basically, I'd like an exhaust that looks, sounds, and performs well. It seems however that everyone has their opinion on what is the best type of slip on (similar to how the opinions that differ so greatly on break in). So I'm wondering, what is your guys' opinion? What's (in your experience) a nice sounding/looking/performing exhaust for a 250 Ninja.

Also I have a smaller question, if I get a new exhaust, do I have to get a "jetting" and what does that mean?

Thanks in advance for your guys' time and responses. Ride safe.
 
#3 ·
Just search on here. This question is covered every couple weeks.

Basically it comes down to what you want and like. No slip on is going to make a drastic performance difference so just get what you like. They are all going to be about the same. You will find that everyone has their own opinion about what is the best, but that is the great part of bikes is you can make yours your own. Good luck.
 
#5 ·
Well I'll just go ahead and ask the question, are you planning on keeping the 250 long term? Because, if not, it isn't really worth it to mod the bike IMO.

Also, I'd wait longer than the first 1000 miles before modding just because you're still a new rider and stand a good chance of dropping your bike if you haven't already. You wouldn't want to damage your mods, etc.
 
#6 ·
It will depend to you or your state(noise police) for the choice of exhaust you can buy. For me personally I like the Full SS Jardine GP1 & the slip-on Hotbodies MGP Growler. IMO they're both have the sickest/loudest sound! The GP1 sounds & it will perform great, just loud.

Jetting means calibrating parts of the carburator for optimal air/fuel ratio.

Note: You can even "jet" your bike's carb now because they came out of the factory w/ a lean air/fuel mixture just by adjusting the air/fuel mixture screw. Read the DIY/mods section of 250s on how to do this.
 
#8 ·
I am also happy with my Yoshi carbon fiber. Per Yoshimura specs...they do recommend jetting.

Instructions:
http://www.yoshimura-rd.com/images/product/pdf/1407272.pdf

You really don't have to wait till after 1,000 miles for the upgrade. My bike has less then 400 miles on it. Just make sure that you get it professionally done.
 
#9 ·
Thanks for the responses guys. Yeah I was leaning toward Yoshi as well like a few of you guys said. I actually rode a dual sport around for a year and have been riding dirt bikes for about eight years so I'm not too worried about dropping my bike. The real question is, whether I want to upgrade it because those exhausts can get quite expensive. Thanks again for your time and responses.
 
#10 ·
SO i have a question for you guys… I have a 09 250r and i want to change out the entire exhaust system from the head back to the muffler, and i think im settled on the Jardine RT-5 full system. If i do so and do NOT re-jet, what is the worst that can happen..??
Will it start..?? Will it run like crap..??
This is NOT a daily driven bike, it will sit in the garage looking pretty and be taken out for a walk a few times a week :)
IMO changing out the rear muffler alone is a waste of time and $$, i am a performance person and feel if your gonna change out the exhaust for better sound/performance, you might as well go the entire length and do it right the 1st time.

Thanks in advance..
 
#11 ·
U won't get any performance gains ot of the pipe without rejetting it with a full exhaust. The bike from the factory is running lean already I heard
 
#15 ·
from all the research i've done & a few tech's from different places told me its not "required" to rejet if all your getting is a slip-on, i bought a yoshi carbon fiber slip on and i havent rejetted and i haven't had any problems with mine. A few people have told me the HP gain/ cost ratio for a full exhaust system isnt worth it since there's only so much HP you can pull out of our little motor's. i would recommend a yoshi slip on. they sound great.
 
#20 ·
Hey rn250r,

I have the exact same bike an '09 250r. I had my shop give my bike new spark plugs, new fuel lines, clean the carburetors again! after I cleaned them twice!! This was in an effort to get ride of a lull it had, it is running to rich. I asked them about getting a new exhaust but that would require "jetting". Without "jetting" and just putting the new exhaust on it would run worse. Basically for me after talking to the guys at the shop and cost it was not worth the "jetting" and new exhaust. I'm not giving up my 250r for a larger bike that has a better exhaust on it.

One last thing they mentioned. You could take the exhaust manifold out of the stock exhaust and that would make it run leaner. I have looked at my exhaust and it's just to messy of a job and no guarantees.

Hope this help.
 
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