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So what do you think? Is Sarge right, or off his rocker?

  • Sarge is spot on! Leave the stock exhaust alone!

    Votes: 134 47.5%
  • Sarge is full of crap! Aftermarket is better, so go for it!

    Votes: 148 52.5%
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some think i practice yoga based on
women also attending yoga sessions..
that is another, reflection of their own,
life views, attitudes and, assumptions..
false, assumptions..

same same assumptions of stupidity
or attention seeking as motives for,
replacing the heavy cat container
with a well designed tight fitting
lightweight carbon lv evoII s/o..

while there are attention seekers
in all societies, including no doubt
using this forum, doesnt mean
we're all stupid or attention seeking
deficients with penis envy..
 

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This whole thread reminds me of that old true story my father told me. When he was flying from London to New York. Some dumb ass passanger asked the flight crew to " Turn down the engines as he/she (guess what sex) could not sleep" My father exited the cockpit & told the passanger. Your free to leave at anytime. It's a long way down.

My BMW is loud as hell. Full Termignonl.With good reason. The avg Thai driver is in koo koo land when behind the wheel. If they don't see me. They will sure as hell hear me. I work on the safety principle. Then again. I worked my ass off for six years to afford it cash. Now i can't afford my penis plastic surgery i was saving for. To make it 12" on the slack... lmao.

*Edit* That's only a 11" increase.
 

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Haha! just saw this thread. I threw on a Masurri exhaust, cheap and pretty. Came out perfect, good looking and all.

I noticed some backfire if i shifted and kept the rpms higher than usual.. wasn't sure if it was really this or my head playing games... but I try and reproduce the sound whenever I shift.. it's dope!
 

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The stock CBR250R exhaust has been criticized for being too ugly, too heavy, and too quiet. Honestly I don't have a problem with the looks and in my application (flyweight sport touring) the stock exhaust is perfect. No negative impact on ride-ability (stalling, erratic idle, cold start problems), not obnoxiously loud and droning, and no maintenance required other than the occasional sandblasting and repaint with high-temp black. The weight is a non-factor for responsible street riding.

I am just thankful the exhaust doesn't look like the CBR150R system:



:eek:

Despite that, this guy managed to get a pretty decent tone with his modification.

https://youtu.be/0e1CDvBLd3E
 

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I am just thankful the exhaust doesn't look like the CBR150R system:



:eek:

Despite that, this guy managed to get a pretty decent tone with his modification.

https://youtu.be/0e1CDvBLd3E
I replaced the exhaust on my 2011 CBR125R (with CBR150R engine) recently. The stock exhaust was rusting and a friend welded it together in a spot where it started to leak near the flange a couple of years ago. I decided that I wanted a higher quality exhaust and my only requirements were that it be relatively quiet and well constructed, and I didn't want to have to re-pack the muffler every few years. I suppose I also didn't want to lose low-end power like my experience with other full exhausts in the past either. If it performed as well as stock - I'd be happy.

Well - in the end - I purchased a new Scorpion Serket Taper (Stainless) for the bike. It certainly sounds a little louder than stock, but not much more so. I have no desire to remove the db killer. It's great that the exhaust never needs packing. And it saved me 5.6 lbs (which is probably mostly due to no catalyst). I have an aRacer programmable ECU for the bike and the combination of ECU and exhaust feels like I've gained some power across the board. I plan to have the bike dyno-tuned later this summer. I have to admit - this is the first time I've actually been happy with an aftermarket exhaust.

I agree with Stichill about the looks of the stock exhaust - and feel that the Scorpion suits the looks of the bike much better. I haven't taken a photo of it - but this is virtually identical to what the bike looks like with the new exhaust.



Mike
 

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My concern with modding 250Rs is that most people consider it a beginner bike that you quickly outgrow. Dumping a bunch of money on aftermarket parts for a bike you expect to flip right away just doesn't make sense, particularly given the low returns on performance parts at this size.

I met somebody who demonstrated that fantastically. He bought a used 250R, immediately dumped a big pile of money on performance parts, and slapped decals of his business logo all over it. Six months later he upgraded, and now he's having a lot of trouble selling the 250 because he didn't keep the stock parts. He would have been better off buying a new 300 and leaving it stock; it would have cost the same, actually had the performance his parts didn't achieve, and he'd get more back selling it with a lot less effort.

My own 250r has a fair bit spent on aftermarket bits with a focus on comfort rather than performance, and I intend to keep it a good long time to make the most of that investment.
 

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forum member selling his bike reinstalled his
stock muffler/cat container [in new condition]
selling his leo vince evoII carbon slip on to me,
for $200 cash, picked up from his place..

she also had a functioning stock horn,
replaced with a better [imo] horn..

also chose all black over other colour schemes..
even did a full paint job on my cb750/4..

to each their own ..
 

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Haha! just saw this thread. I threw on a Masurri exhaust, cheap and pretty. Came out perfect, good looking and all.

I noticed some backfire if i shifted and kept the rpms higher than usual.. wasn't sure if it was really this or my head playing games... but I try and reproduce the sound whenever I shift.. it's dope!
I had a musarri on my 250. To fix the backfiring I cut the end off of a colgate toothbrush and jammed in the hose on the side, problem solved. :p
 

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My BMW is loud as hell. Full Termignonl.With good reason. The avg Thai driver is in koo koo land when behind the wheel. If they don't see me. They will sure as hell hear me.
My understanding is that the exhaust is pointing away from the direction you're travelling, so loud pipes are moot point.
 

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My understanding is that the exhaust is pointing away from the direction you're travelling, so loud pipes are moot point.
Not true. Sure it's louder behind the exhaust, but sound waves travel out in all directions. Unless you're traveling faster than the speed of sound, the noise will proceed you. You still hear trains coming, trucks approaching, and loud muscle cars even if you're not standing behind them.
 
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my horn is pointed downward at the road surface
and yet strangely enough, people can hear it..

for many slip on owners the extra noise
is secondary, and yet there is an upside to
noise, as in for eg, the horn, a safety device..

the fact is - based on real road riding experiences -
that it can be used as a safety device in various
situations, similar to using the horn, yet not
having that 'emergency' effect factor..

you can blip or lightly rev your engine
coming up behind a distracted driver
to let him know youre there, without,
using your horn..
similarly you can blip or rev to alert
a pedestrian about or stepping onto
the road ahead of you or around
the corner you are turning into [etc]
to get their attention without the horn..

aside from heavy loading such as quick overtakes etc,
i can ride easily in traffic etc within speed limits
without making excessive engine noise
as anyone can, if they want to..
using light blipping to get attention of
drivers or pedestrians etc actually decreases
potential noise from using the horn..

responding to critics of using better ie, lighter
simple design mufflers by mentioning use of
engine noise is just another example of
potentials,, and another fact of the matter..
doesnt mean i or others go out and buy
replacement cannisters to use as horns
or to be heard there generally..
its just another factor..

as in most human decisionmaking..
individuals when free to act
individually, may do just that,
using their own mind and
decisionmaking based on their
own views and preferences..

such a lot of hot air for such
a simple basic and common
motorcycle option...
 

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About loud pipes. This is an observation that I've been wondering about for some time. With my stock exhaust bikes - they are relatively quiet and I very rarely encounter wildlife (e.g., deer) scurrying across the road in front of me when riding alone or with other quiet bikes. However, it seems that when I'm riding with someone who has a loud, thunderous exhaust - it not only seems to startle human bystanders, but it seems to send full families of confused, startled, and crazed panicky deer darting across the road in all directions all around us on rural roads. I wonder if there is any correlation between exhaust loudness and risk of injury due to wildlife collisions.
 

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wildlife especially if under hunting pressures
could presumably be startled by say a loud banging
such as a stock harley makes down the road
starting up in the mornings..

wildlife tho are being wiped out along with cars
and drivers/passengers [on usa highways]
running into quiet running cars..
[pbs nova wildways]

it could work both ways of course,
a gun like banging could send wildlife
in the opposite direction..

wildlife have favorite crossing sites
part of movement corridors and could be
heading to or beginning a crossing anyway,
in which case the silent vehicle could
cause a last second startle response
by its unexpected appearance..

as quiet cars and presumably motorcycles
are taken out by wildlife, the go seems to be
to ride [or drive] slowly and carefully
anywhere wildlife might cross roads..

in cities etc, loud vehicles could startle
wild drunks into momentary awareness,
perhaps causing them to pause...
 

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Most deer accidents result from the vehicle being quiet, then coming up on the deer with headlights blinding the animal and they freeze. If they hear you well before they're blinded, they're much more apt to want to get out of the way.
 

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Agree

My 2c. Agree with original poster. I've owned a CBR250R since 2011. Now have a small stable of bikes all the way up to 1100cc. I still enjoy a blast on the twisties on the CBR.

I've used two aftermarket muffler for the CBR ... a 2 sisters I got when I bought the bike new, being a clueless beginner. ******************** thing just about sent me deaf. I was quite happy when it got smashed to buggery when I crashed bike on RHS. Recently been using a slightly beat up Yoshimura carbon I temporarily swapped with my stock over to teach a new rider. We practice at 6am in a public car park with houses around. Would have the cops sent around with noise complaints if he used the Yoshi that came with the bike. That thing is again obnoxiously loud, have to wear ear plugs to go anywhere near it. The 2 sisters had the silencer baffle, but it did bugger all.

Interestingly I have ridden the CBR on the track maybe 30 times, and I have swapped between the 2 sisters and the way heavier stock several times over maybe 20 days, sometimes between sessions. I can categorically confirm that the bike hits a higher terminal speed down the main straight of SMSP with ... wait for it ... the heavy stock muffler ... over the 2 sisters. About 15 kph in it consistently. I can lap SMSP at a consistent pace, usually within a second if traffic doesn't get in the way.

But I do agree the stock muffler looks ********************. So I painted the shitty silver heat shield a high temp black, and it looks way better. That fat muffler just kinda disappears into the swing arm.

The 2 sisters was a carbon, it looked OK, the carbon Yoshi looks better, super sweet. It just fookin deafens you and I'd bet my bottom dollar the Yoshi also wouldn't improve the bikes performance without a dyno tune / power commander.

It really depends if you are a style over substance sort of person ... and even if you lean style - a CBR250R is unlikely to impress many ladies regardless of exhaust. For that you need an even louder Ducati. :wink2:
 

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I painted the heat shield of my CBR250R's exhaust flat black. That was a HUGE improvement!

The rest is just fine the way it is.
 

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For those of you that have yet to change the exhaust, I am going to throw my two cents in on the subject in this thread.


  • Our bikes are 250cc. They produce 23 hp or so, from what I have read. You risk turning your bike into a POS that backfires, produces too much noise, gets worse gas mileage, etc. all for perhaps a tiny tiny gain when you mess with the exhaust. Or, even worse, you get all of the above with no measurable gain.
  • Honda designers engineered a very suitable exhaust system for this bike.
  • Exhaust is more than just "opening it up so it can breathe." If this were not the case then the best exhaust mod would be to hack the thing off and leave it open.
  • Exhaust scavenging improves engine efficiency, and scavenging comes from an ideal amount of exhaust restriction.
  • Look at all the threads on this site about making aftermarket exhaust quieter. Most aftermarket exhausts, I will venture to say, add more NOISE increase than Horsepower.
  • A loud exhaust does not make you safer, only more obnoxious. At moderate to higher speeds people behind you (i.e. those that see you) may hear you better... those in front, they still can't hear you.
  • You may want to sell your bike someday. You may have to spend money to get it back to bone stock in order to entice a buyer willing to pay top dollar, or else you may have to sell it at a discount because its got a stupid fart can on the side of it. Many people looking at used bikes, myself included, would look at an aftermarket exhaust on this bike and think it is a big red flag not to buy the used bike in question. Save the money you'd spend on this exhaust and put it toward your next bike, if you aspire to a more powerful bike.
  • Stock exhaust weighs 40 pounds? Okay, I will take peoples word for it that they weighed it on a scale. Aftermarket exhaust weighs 10 pounds? Okay, so the weight savings is 30 pounds. Why not just exercise more, get healthier yourself, and lose that 30 pounds from your belly instead of changing your exhaust? Put the $500 you'd spend on the exhaust towards weight watchers.
Leave the exhaust alone! You are making your bike look stupid, you are wasting money, and it is only a 250cc after all. It is not a Corvette. The only people that benefit when you upgrade your exhaust are the shareholders in the company that manufactured the exhaust and the website that sold it. The people that are losing out are, you, your family, your neighbors for having to listen to your stupid 250cc roaring like a rocket ship, your riding buddies, anyone that sees you on the street, your bike's next owner, yada yada yada...


Discuss.
The CBR250 stock pipe is horrendous. Changing it increases horse power by 5 and a K&N filter gives it another 2. So now you have a real decent small sport bike that sounds bad ass and not like a fart and look like ****.
 

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I generally prefer the OEM exhaust system, but, I plan to ride the bike to death.
 

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The CBR250 stock pipe is horrendous. Changing it increases horse power by 5 and a K&N filter gives it another 2. So now you have a real decent small sport bike that sounds bad ass and not like a fart and look like ****.
no
 
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