What exhaust are you running and how do you like it?

cynicalkit · January 24th, 2012, 01:52 PM

Okay so I have a makeshift exhaust on my bike right now. After talking to Rexbo and realizing i'm down 5hp right now I think I should probably get up to speed with a new exhaust and jetting to at least stand some sort of chance. Now here is where the subject question comes in.

What exhaust are you guys running or recommend and any noticeable pro's and con? Price, weight, etc.

Halp!

Skippii · January 24th, 2012, 02:02 PM

You don't want to know...

bob706 · January 24th, 2012, 02:13 PM

Mgp Growler slip on. It weighs next to nothing and my mileage went up slightly with 2 shims. It is however louder than hell.

Shikari99 · January 24th, 2012, 02:29 PM

HMF Slip-On, pretty loud can hear it from a bit away. Sounds pretty good though, got compliments on it at my MSF and Military Sport bike course

DSpinler · January 24th, 2012, 02:34 PM

DanMoto Carbon GP - I like it, but after perusing the forums, I can definitely tell that the bike runs lean (and did from the factory) looking to shim the carb needles soon.

Other than that, it looks great, was inexpensive, sounds mean, and was generally what I wanted. 9/10 stars atm.

JS73 · January 24th, 2012, 02:39 PM

AreaP quietcore. Little heavier than the standard one, but I don't really notice a performance difference from the others when on the track.

Jojah17 · January 24th, 2012, 02:52 PM

Area P Header + DanMoto Can. Light, good butt dyno increase, loud as balls.

Alex · January 24th, 2012, 03:00 PM

Guys, this is the track section of the site.

Slip-ons do very little for the performance of our favorite bike, and noise/looks are inconsequential in this context, so the only real choices for someone looking for a few precious hp are the various full systems available. Ping racebikerentals or any of the other long-time ninja 250 track junkies, as I know they've been through a few different setups over the years.

Rexbo · January 24th, 2012, 03:12 PM

I personally run a Jardine GP-1 because its the absolute lightest one out there, is tucked away so if I munch it I probably wont need to replace it, but its also the loudest... on the whole grid! People say it won't make power but I made 31.9 on the dyno with that bad boy, so I don't see a downside here.

Then take your bike to Andy at West Coast GP cycles, tell him you race CVMA and he'll give you the same tune I got!

choneofakind · January 24th, 2012, 07:21 PM

Quote:

Originally Posted by Rexbo

but its also the loudest... on the whole grid!
!

I dunno, I think he's got some competition for you

Quote:

Originally Posted by Jojah17

Area P Header + DanMoto Can. Light, good butt dyno increase, loud as balls.

Jonah 17 do you have the race system header or the standard full system headers, just for clarification here

walty87 · January 24th, 2012, 08:27 PM

mgp growler slip on as well.

I have yet to put on 2 shims, and it's running lean! Crackles and pops!

It's loud, which I don't mind! I kinda like the sound! I just need to shim already!

choneofakind · January 24th, 2012, 08:29 PM

Quote:

Originally Posted by walty87

mgp growler slip on as well.

I have yet to put on 2 shims, and it's running lean! Crackles and pops!

It's loud, which I don't mind! I kinda like the sound! I just need to shim already!

dude.

Quote:

Originally Posted by Alex

Guys, this is the track section of the site.

Slip-ons do very little for the performance of our favorite bike, and noise/looks are inconsequential in this context, so the only real choices for someone looking for a few precious hp are the various full systems available.

PS, try this to remove your crackling

But still shim because it still needs it.

sowega · January 24th, 2012, 09:22 PM

Area P long canister. My tuner has tried most all of the pipes available for the 250, and the Area P 18 incher makes the most power on his dyno.

Skippii · January 24th, 2012, 09:33 PM

Quote:

Originally Posted by Alex

Guys, this is the track section of the site.

Slip-ons do very little for the performance of our favorite bike, and noise/looks are inconsequential in this context, so the only real choices for someone looking for a few precious hp are the various full systems available.

I must respectfully disagree with this. Neither is really going to do anything much for the 250's hp. The biggest performance benefit seems to come from the light-weight mufflers available, which help handling and braking. Obviously, racers need any advantage they get, but for track days, the weight loss of even a slip-on is going to be a lot more noticeable than even the power boost of a full system.

Alex · January 24th, 2012, 09:53 PM

The restrictions in the stock new-gen's exhaust are in the headers as well as the end can. These aren't hypothetical musings, it's what exhaust builders and designers have found with the 250.

Quote:

Originally Posted by kbryant

No plans to ever offer one. When we were doing our R&D on the full system, we did prototype a Slip-On and tested it extensively. It made slightly less than 1 hp, with a Dynojet Kit. It simply made no sense at all to manufacture it.

A moderately tuned ninjette with intake mods, full exhaust, and good jetting gets in the 30 - 32 peak rwhp range. That same bike with none of those mods is in the 25-26 peak rwhp range. The gains in peak hp are well over 10%, and 15% isn't out of the ballpark. Even if the slip-on exhaust saved 20 pounds over the stock can (it doesn't), that would be a percent gain in acceleration of about 4%. (assuming 370 pound wet weight bike, 150 pound rider). Every little bit counts, but you're overly discounting the effect of the hp increase.

choneofakind · January 24th, 2012, 11:24 PM

Quote:

Originally Posted by Skippii

the weight loss of even a slip-on is going to be a lot more noticeable than even the power boost of a full system.

What about getting both the weight loss, and the power boost at once?

Area P 18" full race exhaust
10 lbs weight saving + 10 hp gain at peak + more torque the whole way through the rev range with a secondary hump at 10k. Power increase all the way from 3000 rpm

http://areapnolimits.com/products/Sl...-Race-2008.php

Makes me want a new 250R. I plan on getting a new one after college. If Kerry is still making this system at that point in time, you can guess what exhaust system is going on it

ROADandTRACK · January 25th, 2012, 12:14 AM

Quote:

Originally Posted by Skippii

I must respectfully disagree with this. Neither is really going to do anything much for the 250's hp. The biggest performance benefit seems to come from the light-weight mufflers available, which help handling and braking. Obviously, racers need any advantage they get, but for track days, the weight loss of even a slip-on is going to be a lot more noticeable than even the power boost of a full system.

Sorry not true.

ROADandTRACK · January 25th, 2012, 12:17 AM

M4, best power/torque and I've built quite a few.

Muzzy for the old gen, and then you want an old style w/o much muffler angle.
The bend won't drag when racing like the new ones w/ more angle to look more modern.

Skippii · January 25th, 2012, 02:22 AM

Quote:

Originally Posted by choneofakind

What about getting both the weight loss, and the power boost at once?

Area P 18" full race exhaust
10 lbs weight saving + 10 hp gain at peak + more torque the whole way through the rev range with a secondary hump at 10k. Power increase all the way from 3000 rpm

http://areapnolimits.com/products/Sl...-Race-2008.php

Makes me want a new 250R. I plan on getting a new one after college. If Kerry is still making this system at that point in time, you can guess what exhaust system is going on it

From their site:
OEM Peak Power: 24.56hp
Full Race System peak power: 31.57hp
"You will notice that at peak power the Race System is more than 10.5 hp over the OEM exhaust"
.....okay, I get what they mean, but this is a really awkward way of saying the race system puts out a peak of 7hp more than the stock bike's peak.

Also, notice that the standard full system is 4.8hp over stock, and that includes the airbox removal.

All I'm saying is that if you're not racing, removing the airbox and going to K&N Pods with a slipon exhaust with a full rejet is going to get you results very similar to the full system with no airbox and a full rejet.

Now, obviously there ....actually, nevermind. It's 4:30am and I'm going to bed.

choneofakind · January 25th, 2012, 08:03 AM

yeah I get where you're coming from skippii. For the street, the benefit is more than enough.

But the OP wants suggestions for the track, where every hp gained and lb lost is going to be noticed because all the bikes are tuned, and realistically every bike is likely within a few hp of each other, so small things (like 2 lbs) make a difference

dino74 · January 25th, 2012, 09:53 AM

I got the full race with Aluminium Silencer from tyga-performance.com. At the time, there was a special and it was $290 but it $310 now.

It works for me, mainly because it's cheap.

They also sell just the system without a muffler for $188. I don't know how this would compare to the stock system without the muffler.

choneofakind · January 25th, 2012, 10:16 AM

Quote:

Originally Posted by dino74

I don't know how this would compare to the stock system without the muffler.

better. Stock system headers have a cat that restricts flow

cynicalkit · January 25th, 2012, 04:13 PM

Thanks guys, starting to save money......now!

walty87 · January 25th, 2012, 07:13 PM

Just to update.

I have the mgp growler slip on. (as said above ^ ^)

Today I finally shimmed my needles and put two 3mm washers under each needle. It only took me like 2 hours, and I've never done anything like this before. The DIY's were super helpful!

Anyways, my bike runs WAY smoother now, and sounds WAY better. It is a loud pipe, but I like it.

Cant say i've seen performance gains though in regards to it being faster / more power haha. But it's fun!

Skippii · January 26th, 2012, 12:21 PM

Quote:

Originally Posted by choneofakind

better. Stock system headers have a cat that restricts flow

Whoa....we were talking about new gens? The ones with the really restrictive cats in the headers?
Why do you guys let me sign on at 4:30am? Seriously, @Alex, you should block my access here when I'm too tired to read a thread....

Nemesis · January 26th, 2012, 12:49 PM

Would running your bike without an exhaust can and/or headers decrease HP?

dino74 · January 26th, 2012, 01:32 PM

Quote:

Originally Posted by Nemesis

Would running your bike without an exhaust can and/or headers decrease HP?

Nem, can you imagine if all the 250s at CVMA sounded like Rexbo's bike....

Skippii · January 26th, 2012, 01:49 PM

Quote:

Originally Posted by Nemesis

Would running your bike without an exhaust can and/or headers decrease HP?

The design of the headers and cam timing plays an important part in filling up the cylinder with fuel/air. By having a lower pressure pulse in the headers, it can help to suck fuel into the cylinder during the overlap when both intake and exhaust valves are open. Without the header, it would suck in air and exhaust from around the bike instead of fuel from the carbs. 2-strokes are even more complicated, because they actually suck fuel from the carbs straight through the cylinders into the header, and then from there suck it back into the cylinder,
Posted via Mobile Device

ROADandTRACK · January 26th, 2012, 04:21 PM

Quote:

Originally Posted by Skippii

The design of the headers and cam timing plays an important part in filling up the cylinder with fuel/air. By having a lower pressure pulse in the headers, it can help to suck fuel into the cylinder during the overlap when both intake and exhaust valves are open. Without the header, it would suck in air and exhaust from around the bike instead of fuel from the carbs. 2-strokes are even more complicated, because they actually suck fuel from the carbs straight through the cylinders into the header, and then from there suck it back into the cylinder,
Posted via Mobile Device

That's not correct. I goes from carbs to crank to exhaust.

Felipe the Ant · January 26th, 2012, 04:32 PM

It goes in both.

But to be on topic, I have a full yoshi system with a carbon can and love it. It's wicked loud but it sounds good

LoD575 · January 26th, 2012, 05:04 PM

I plan on going with Area P once my warranty runs out later this year. Will probably go with the 12" carbon standard setup and jet the carbs.
I do not plan on messing with the factory air box at all.

Skippii · January 26th, 2012, 09:54 PM

Quote:

Originally Posted by ROADandTRACK

That's not correct. I goes from carbs to crank to exhaust.

Okay, I oversimplified it a bit and left the crank out, since it doesn't really play much of a role in the combustion process, but still, It doesn't go straight from crank to exhaust--it still goes through the cylinder.

EsrTek · January 26th, 2012, 10:00 PM

Quote:

Originally Posted by LoD575

I plan on going with Area P once my warranty runs out later this year. Will probably go with the 12" carbon standard setup and jet the carbs.
I do not plan on messing with the factory air box at all.

This is setup I went with, however I did take the snorkel out of stock airbox and put a pipercross filter in!!

LoD575 · January 26th, 2012, 10:57 PM

Quote:

Originally Posted by EsrTek

This is setup I went with, however I did take the snorkel out of stock airbox and put a pipercross filter in!!

I do plan to remove the snorkel but leave the airbox in and run an aftermarket K&N or Pipercross filter.

ROADandTRACK · January 27th, 2012, 12:15 AM

Quote:

Originally Posted by Skippii

Okay, I oversimplified it a bit and left the crank out, since it doesn't really play much of a role in the combustion process, but still, It doesn't go straight from crank to exhaust--it still goes through the cylinder.

No problem

Nemesis · January 27th, 2012, 08:19 AM

Quote:

Originally Posted by Skippii

The design of the headers and cam timing plays an important part in filling up the cylinder with fuel/air. By having a lower pressure pulse in the headers, it can help to suck fuel into the cylinder during the overlap when both intake and exhaust valves are open. Without the header, it would suck in air and exhaust from around the bike instead of fuel from the carbs. 2-strokes are even more complicated, because they actually suck fuel from the carbs straight through the cylinders into the header, and then from there suck it back into the cylinder,
Posted via Mobile Device

Okay...I ask cuz I started to take apart my bike to get it ready for the inaugural first in March and noticed my headers were never fully tightened down--literally unscrew the nuts with my fingers and the headers will just sorta dangling. And I was still producing 30.5 HP.

BTW, the HP key isn't in the exhaust can. Take is all. Can't reveal all my secrets.

Felipe the Ant · January 27th, 2012, 11:45 AM

brb unbolting my exhaust for more HP

ROADandTRACK · January 27th, 2012, 01:38 PM

Quote:

Originally Posted by Nemesis

Okay...I ask cuz I started to take apart my bike to get it ready for the inaugural first in March and noticed my headers were never fully tightened down--literally unscrew the nuts with my fingers and the headers will just sorta dangling. And I was still producing 30.5 HP.

BTW, the HP key isn't in the exhaust can. Take is all. Can't reveal all my secrets.

the HP numbers means nothing unless you compare w/ another bike on same dyno. I know some dynos have said over 30 and when we ran here they were 28.

Nemesis · January 27th, 2012, 01:46 PM

Quote:

Originally Posted by ROADandTRACK

the HP numbers means nothing unless you compare w/ another bike on same dyno. I know some dynos have said over 30 and when we ran here they were 28.

Yes, yes...we all know this.

The place I got mine dyno'd at read numbers lower than other well known shops. So, am I producing 30.5HP or 33.5HP?

Catch my drift?

ROADandTRACK · January 27th, 2012, 08:38 PM

Quote:

Originally Posted by Nemesis

Yes, yes...we all know this.

The place I got mine dyno'd at read numbers lower than other well known shops. So, am I producing 30.5HP or 33.5HP?

Catch my drift?

you are awesome!!!

January 24th, 2012, 01:52 PM	#1
cynicalkit la pussy gata Name: kit Location: xx Join Date: Jan 2011 Motorcycle(s): big wheel Posts: 540	What exhaust are you running and how do you like it? Okay so I have a makeshift exhaust on my bike right now. After talking to Rexbo and realizing i'm down 5hp right now I think I should probably get up to speed with a new exhaust and jetting to at least stand some sort of chance. Now here is where the subject question comes in. What exhaust are you guys running or recommend and any noticeable pro's and con? Price, weight, etc. Halp!

January 24th, 2012, 02:02 PM	#2
Skippii Milkshake Drinker Name: Skippii Location: Richmond, Va Join Date: Aug 2011 Motorcycle(s): 2007 Orange DRZ400-S, 2005 Ninja 250 & Custom Thundercunt Dirt Chopper Posts: A lot.	You don't want to know... __________________________________________________ "What a sweetheart."- ninja_sleeper to me

January 24th, 2012, 02:13 PM	#3
bob706 ninjette.org certified postwhore Name: Sean Location: Mary Esther, FL Join Date: Jan 2009 Motorcycle(s): 2008 Ninja 250 1998 HD Road King Posts: A lot.	Mgp Growler slip on. It weighs next to nothing and my mileage went up slightly with 2 shims. It is however louder than hell. __________________________________________________ http://sandollarmotorcycleclub.com/

January 24th, 2012, 02:39 PM	#6
JS73 ninjette.org guru Name: Joel Location: Orlando, FL Join Date: Dec 2008 Motorcycle(s): 08 Ninja 250 Posts: 256	AreaP quietcore. Little heavier than the standard one, but I don't really notice a performance difference from the others when on the track. __________________________________________________ WERA #273 Novice Boogeyman Racing.

January 24th, 2012, 03:00 PM	#8
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	Guys, this is the track section of the site. Slip-ons do very little for the performance of our favorite bike, and noise/looks are inconsequential in this context, so the only real choices for someone looking for a few precious hp are the various full systems available. Ping racebikerentals or any of the other long-time ninja 250 track junkies, as I know they've been through a few different setups over the years. __________________________________________________ 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)

January 24th, 2012, 02:29 PM	#4
Shikari99 ninjette.org member Name: Shikari Location: NJ Join Date: Jun 2011 Motorcycle(s): 11' 250R Posts: 27	HMF Slip-On, pretty loud can hear it from a bit away. Sounds pretty good though, got compliments on it at my MSF and Military Sport bike course

January 24th, 2012, 02:34 PM	#5
DSpinler Your Lord Funny Bits Name: Darrell Location: Fort Collins Join Date: Jan 2012 Motorcycle(s): 2011 Kawasaki Ninja 250 Posts: 95	DanMoto Carbon GP - I like it, but after perusing the forums, I can definitely tell that the bike runs lean (and did from the factory) looking to shim the carb needles soon. Other than that, it looks great, was inexpensive, sounds mean, and was generally what I wanted. 9/10 stars atm.

January 24th, 2012, 02:52 PM	#7
Jojah17 ninjette.org member Name: Ben Location: Atlanta Join Date: Feb 2011 Motorcycle(s): 2008 Honja Posts: 171	Area P Header + DanMoto Can. Light, good butt dyno increase, loud as balls.

January 24th, 2012, 03:12 PM	#9
Rexbo CVMA / AFM / M1GP #250 Name: Steve Location: Los Angeles Join Date: Sep 2009 Motorcycle(s): 2009 Ninja 250r, 2011 Zero S, 2009 KLR 650 Posts: A lot.	I personally run a Jardine GP-1 because its the absolute lightest one out there, is tucked away so if I munch it I probably wont need to replace it, but its also the loudest... on the whole grid! People say it won't make power but I made 31.9 on the dyno with that bad boy, so I don't see a downside here. Then take your bike to Andy at West Coast GP cycles, tell him you race CVMA and he'll give you the same tune I got!

January 24th, 2012, 08:27 PM	#11
walty87 ninjette.org guru Name: andrew Location: oakdale california Join Date: Nov 2011 Motorcycle(s): 2012 ninja 250 Posts: 296	mgp growler slip on as well. I have yet to put on 2 shims, and it's running lean! Crackles and pops! It's loud, which I don't mind! I kinda like the sound! I just need to shim already!

January 24th, 2012, 09:22 PM	#13
sowega ninjette.org guru Name: Ed Location: Atlanta, GA Join Date: Mar 2011 Motorcycle(s): 899, 748, 250, 250, 70 Posts: 348	Area P long canister. My tuner has tried most all of the pipes available for the 250, and the Area P 18 incher makes the most power on his dyno. __________________________________________________ Eberhart Creative

January 25th, 2012, 12:17 AM	#18
ROADandTRACK R&T Suspension Name: K Hertell Location: San Antonio, TEXAS Join Date: Jun 2009 Motorcycle(s): Too many to list Posts: 175	M4, best power/torque and I've built quite a few. Muzzy for the old gen, and then you want an old style w/o much muffler angle. The bend won't drag when racing like the new ones w/ more angle to look more modern.

January 25th, 2012, 08:03 AM	#20
choneofakind ninjette.org certified postwhore Name: . Location: . Join Date: Feb 2011 Motorcycle(s): . Posts: Too much. MOTM - Feb '13, Feb '14	yeah I get where you're coming from skippii. For the street, the benefit is more than enough. But the OP wants suggestions for the track, where every hp gained and lb lost is going to be noticed because all the bikes are tuned, and realistically every bike is likely within a few hp of each other, so small things (like 2 lbs) make a difference

January 25th, 2012, 09:53 AM	#21
dino74 ninjette.org certified postwhore Name: dino Location: Oceanside, Ca Join Date: Nov 2010 Motorcycle(s): '09 250 Street, '09 250 Race, '13 300 Race Posts: A lot.	I got the full race with Aluminium Silencer from tyga-performance.com. At the time, there was a special and it was $290 but it $310 now. It works for me, mainly because it's cheap. They also sell just the system without a muffler for $188. I don't know how this would compare to the stock system without the muffler. __________________________________________________ CVMA #55

January 25th, 2012, 04:13 PM	#23
cynicalkit la pussy gata Name: kit Location: xx Join Date: Jan 2011 Motorcycle(s): big wheel Posts: 540	Thanks guys, starting to save money......now!

January 25th, 2012, 07:13 PM	#24
walty87 ninjette.org guru Name: andrew Location: oakdale california Join Date: Nov 2011 Motorcycle(s): 2012 ninja 250 Posts: 296	Just to update. I have the mgp growler slip on. (as said above ^ ^) Today I finally shimmed my needles and put two 3mm washers under each needle. It only took me like 2 hours, and I've never done anything like this before. The DIY's were super helpful! Anyways, my bike runs WAY smoother now, and sounds WAY better. It is a loud pipe, but I like it. Cant say i've seen performance gains though in regards to it being faster / more power haha. But it's fun!

January 26th, 2012, 12:49 PM	#26
Nemesis CVMA #74 WSMC #750 Name: Nemesis Location: On the track Join Date: Oct 2009 Motorcycle(s): All of them Posts: A lot.	Would running your bike without an exhaust can and/or headers decrease HP? __________________________________________________

January 26th, 2012, 04:32 PM	#30
Felipe the Ant ninjette.org sage Name: . Location: . Join Date: May 2011 Motorcycle(s): 2011 Ninja 250R SE GREEN! Posts: 562	It goes in both. But to be on topic, I have a full yoshi system with a carbon can and love it. It's wicked loud but it sounds good __________________________________________________ Trust me, I'm a banana!

January 26th, 2012, 05:04 PM	#31
LoD575 ninjette.org sage Name: Steve Location: Valdosta GA, US Join Date: Jul 2011 Motorcycle(s): 2012 Ninja 250, 2006 Ninja ZX6R-636 Posts: 661	I plan on going with Area P once my warranty runs out later this year. Will probably go with the 12" carbon standard setup and jet the carbs. I do not plan on messing with the factory air box at all.

January 27th, 2012, 11:45 AM	#37
Felipe the Ant ninjette.org sage Name: . Location: . Join Date: May 2011 Motorcycle(s): 2011 Ninja 250R SE GREEN! Posts: 562	brb unbolting my exhaust for more HP __________________________________________________ Trust me, I'm a banana!

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