Does Two Bros Exhaust add any power??

venmichaels · August 16th, 2011, 09:59 AM

Does adding a carbon fiber two bros slip on exhaust add any power to the 08 ninja 250r??
Or is it simply for the sound/aesthetic purpose only??

Can you actually feel an increase in power??

dubojr1 · August 16th, 2011, 10:01 AM

Do you plan on jetting to go with it?

venmichaels · August 16th, 2011, 10:05 AM

sorry. mods please move to 08-up section..

And no i dont..

Alex · August 16th, 2011, 10:13 AM

/moved to new-gen tech.

A slip-on without any jetting will not add any power. A slip-on with proper jetting will not add much power, if any. If you want measurable / significant performance gains on the 250, a full system is the recommended approach.

venmichaels · August 16th, 2011, 10:15 AM

how much would a whole system cost? and how much power gain??

Alex · August 16th, 2011, 10:26 AM

They range from $200 - $800 depending on manufacturer. Dynos vary, but getting 3 - 5 hp additional peak horsepower is the general expectation. People here have had good success with the Area P offerings, but there are other brands available as well if you search around.

dubojr1 · August 16th, 2011, 11:07 AM

+1 for the Area P!!!

venmichaels · August 16th, 2011, 11:08 AM

Is 3to5 hp very noticeable on our bikes??

dubojr1 · August 16th, 2011, 11:09 AM

IMHO....Yes

FBNTH · August 16th, 2011, 11:39 AM

One article I read says the 08+ 250r makes 26.40 hp @ 11,000 rpm. If this were increased by 5 hp, that would be an increase of just under 19%.

dubojr1 · August 16th, 2011, 11:43 AM

I'm not sure you'll get the full 5 hp out of just exhaust though. You'll need to do some other mods in addition to so you can get the bike's full potential. A 31-32 hp total would be expected from a fully modded bike.

FBNTH · August 16th, 2011, 12:22 PM

Another thing to think about is generally when you replace intake and exhaust, you are increasing the ability of the engine to move air. Stock intake/exhaust is very restrictive at high RPM's which results in power dropping like a brick after a certain point. By replacing with aftermarket intake/exhaust while also increasing fuel, you are getting a lot more power at red line. So you may see the 3-5 HP gain from peak, but you would be seeing a much larger increase if you compare power at red line where stock system would drop but aftermarket would level off. This would keep the bike from feeling anemic at high RPM or WOT.

dubojr1 · August 16th, 2011, 12:38 PM

FWIW. My bike pulls hard all the way past the stock red-line of 12,500 rpm's. I think I've done all the HP mods available though including the BRT that increases the stock red-line to 15,000 rpm's.

austinm911 · August 16th, 2011, 02:54 PM

Go Area P, I noticed a significant increase in power after it was jetted. The first few times I rode after the jet i ended up in the 80s frequently because I wasn't used to the increase in power. It's about a 15% increase. It sounds great as well.

The Blue Rider · August 18th, 2011, 03:29 PM

Power, horsepower, feh... Numbers. You're talking about 27hp +/- 3 hp on an entry-level bike built to a cheap price point, not a MotoGP prototype. At this level of bike, it's all about feel and response vs. economy. And if you open up the system, and spend the money for an Area P, the feel and response is fcking GREAT.

If you want to add more juice, install an Area P exhaust, open up the intake as far as your mechanical aptitude and desires take you, twiddle the jetting to match, and you get a whole different bike. The "Just Barely Enough" syndrome that plagues the stock 250R goes away. You can do it yourself if you've got a garage, a socket set, some allen wrenches, a torque wrench, and internet access while you're working.

You can thank us later

August 16th, 2011, 09:59 AM	#1
venmichaels ninjette.org member Name: miguel Location: tx Join Date: Jun 2011 Motorcycle(s): 08 ninja 250r Posts: 50	Does Two Bros Exhaust add any power?? Does adding a carbon fiber two bros slip on exhaust add any power to the 08 ninja 250r?? Or is it simply for the sound/aesthetic purpose only?? Can you actually feel an increase in power??

August 16th, 2011, 10:01 AM	#2
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	Do you plan on jetting to go with it? __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

August 16th, 2011, 10:13 AM	#4
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	/moved to new-gen tech. A slip-on without any jetting will not add any power. A slip-on with proper jetting will not add much power, if any. If you want measurable / significant performance gains on the 250, a full system is the recommended approach. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

August 16th, 2011, 10:26 AM	#6
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	They range from $200 - $800 depending on manufacturer. Dynos vary, but getting 3 - 5 hp additional peak horsepower is the general expectation. People here have had good success with the Area P offerings, but there are other brands available as well if you search around. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

August 16th, 2011, 11:09 AM	#9
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	IMHO....Yes __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

August 16th, 2011, 10:05 AM	#3
venmichaels ninjette.org member Name: miguel Location: tx Join Date: Jun 2011 Motorcycle(s): 08 ninja 250r Posts: 50	sorry. mods please move to 08-up section.. And no i dont..

August 16th, 2011, 10:15 AM	#5
venmichaels ninjette.org member Name: miguel Location: tx Join Date: Jun 2011 Motorcycle(s): 08 ninja 250r Posts: 50	how much would a whole system cost? and how much power gain??

August 16th, 2011, 11:08 AM	#8
venmichaels ninjette.org member Name: miguel Location: tx Join Date: Jun 2011 Motorcycle(s): 08 ninja 250r Posts: 50	Is 3to5 hp very noticeable on our bikes??

August 16th, 2011, 11:39 AM	#10
FBNTH ninjette.org member Name: Rick Location: Winter Park, Fl Join Date: Jul 2011 Motorcycle(s): None yet Posts: 64	One article I read says the 08+ 250r makes 26.40 hp @ 11,000 rpm. If this were increased by 5 hp, that would be an increase of just under 19%. __________________________________________________ Rick

August 16th, 2011, 11:43 AM	#11
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	I'm not sure you'll get the full 5 hp out of just exhaust though. You'll need to do some other mods in addition to so you can get the bike's full potential. A 31-32 hp total would be expected from a fully modded bike. __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

August 16th, 2011, 12:22 PM	#12
FBNTH ninjette.org member Name: Rick Location: Winter Park, Fl Join Date: Jul 2011 Motorcycle(s): None yet Posts: 64	Another thing to think about is generally when you replace intake and exhaust, you are increasing the ability of the engine to move air. Stock intake/exhaust is very restrictive at high RPM's which results in power dropping like a brick after a certain point. By replacing with aftermarket intake/exhaust while also increasing fuel, you are getting a lot more power at red line. So you may see the 3-5 HP gain from peak, but you would be seeing a much larger increase if you compare power at red line where stock system would drop but aftermarket would level off. This would keep the bike from feeling anemic at high RPM or WOT. __________________________________________________ Rick

August 16th, 2011, 12:38 PM	#13
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	FWIW. My bike pulls hard all the way past the stock red-line of 12,500 rpm's. I think I've done all the HP mods available though including the BRT that increases the stock red-line to 15,000 rpm's. __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

August 16th, 2011, 02:54 PM	#14
austinm911 ninjette.org member Name: Austin Location: San Diego Join Date: Jan 2011 Motorcycle(s): 2009 Ninja 250r Posts: 72	Go Area P, I noticed a significant increase in power after it was jetted. The first few times I rode after the jet i ended up in the 80s frequently because I wasn't used to the increase in power. It's about a 15% increase. It sounds great as well.

August 18th, 2011, 03:29 PM	#15
The Blue Rider ninjette.org member Name: Terry Location: Euless, TX Join Date: Dec 2010 Motorcycle(s): '09 Ninja 250R Posts: 43	Power, horsepower, feh... Numbers. You're talking about 27hp +/- 3 hp on an entry-level bike built to a cheap price point, not a MotoGP prototype. At this level of bike, it's all about feel and response vs. economy. And if you open up the system, and spend the money for an Area P, the feel and response is fcking GREAT. If you want to add more juice, install an Area P exhaust, open up the intake as far as your mechanical aptitude and desires take you, twiddle the jetting to match, and you get a whole different bike. The "Just Barely Enough" syndrome that plagues the stock 250R goes away. You can do it yourself if you've got a garage, a socket set, some allen wrenches, a torque wrench, and internet access while you're working. You can thank us later

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