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Quiet Aftermarket Exhausts?

15071 Views 34 Replies 20 Participants Last post by  Stichill
I'm not thinking of buying one yet, but when that day comes, when I do need a new exhaust, over here, it's got to pass the MOT test. That means if it's got "Not for road use" stamped on it, and it's too loud, it isn't going to pass. I came across this website that is selling "EC" stamped exhausts, that are supposed to be road legal. I've heard many complaints on here about aftermarket exhausts being too loud. I quite like the look of the cheapest Remus can, and the cheapest Scorpion can (I think you can buy the Scorpion can in stainless steel elsewhere). I've also noticed that the Leo Vince Evo I and II is being sold on here as street legal. I wonder if they have quieter baffles in them than is sold elsewhere in the world, or they're bending the truth a bit. I thought this may be of interest to those of you who wanted a different exhaust, but also didn't want one that was unsociably loud. ;)

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Anyone here tried the Scorpion stainless steel slip-on?:)
After watching a few youtube clips of exhausts for our bikes its clear to me the one to get for sound is the Akra with db silencer. I cant think of any other with a nicer sound.
The trouble with listening to clips on Youtube, is it's very difficult to judge the volume of an exhaust. My bike sounds mean, if you watch any of my Youtube clips, but it sounds more like a sewing machine to me, when I'm riding it. :D
I'm hoping to pick up a Akrapovic soon. For now I removed my intake snorkel... It sounds surprisingly good. Alot better than stock.
noticed new akro slip-on $799 at dealer,
my leo vinc one evo II carbon slip-on
was $200 good used from a member here,
which made its sound sound even better..
The trouble with lstening to clips on Youtube, is it's very difficult to judge the volume of an exhaust. My bike sounds mean, if you watch any of my Youtube clips, but it sounds more like a sewing machine to me, when I'm riding it.
+1 on the your tube sound clips, it sounds nothing like the real thing. You would need some high end recording equipment and a proper sound studio to come anywhere near what it sounds like without the real thing.

Got the Akrapovic carbon fiber slip on a couple weeks ago and it sounds great! It does sound bit like a dirt bike but that's somewhat expected, but now I can hear what the bike is doing. It's loud enough to draw some attention which is good for surrounding traffic. Throttle blip and decel sound great! It looks amazing on my tri-color, and the weight savings and small performance gains alone are worth the price.
Yep, been wondering about a quite aftermarket exhaust too for some time. I put a Ninja 250 exhaust on my bike, and it looked good, I liked it a lot.

It seem like the inlet was a little smaller than the 250 exhaust, which was no big deal to me, I made it work.

Until it few weeks back, I blow it complete off riding down the freeway…. It muffler got banged up, so I just put my stock one back on.

I was think about doing like a stork R6 exhaust next…

here it is with the ninja exhaust:

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Hello fellow bikers,
Haven't been here for a while, how are you? Anyway...i've ordered a "custom" exhaust in my country (indonesia). I asked to make it as quite as possible (close to the stock exhaust). I will let you guys know how it turns out. The best part of it is you can design it as you wish and it costs about 100 bucks. The guy who makes it is a professional racing exhaust designer. Well i hope it turns out as i wanted it. :))
I'm a big fan of my Leo Vince evo in stainless. I wish I'd recorded before/after, but after is roughly as loud as my partner's stock harley sportster at idle. Nice sound while running as well. Working at a relatively 'professional' establishment, it would be highly frowned on to come in with a really loud exhaust. This is just loud enough to sound like a real bike, and just quiet enough to pass for 'mature' and 'professional' as long as I behave myself with the throttle. ;)
update on lv evoII slip-on, two weeks and already
notice its become quieter, well, to be more accurate
noticed ive adapted to it in general riding style
as she sounds like a motorcycle not a lawnmower
now which is ongoing feedback as to what the engine
- ie, my input to it via the throttle - is doing..

small changes include less throttle in rev matching
when downshifting.. short sharpish blipping gives
feedback of 'not so much needed'..
noticed now not extending into rev range so far
while progressing thru gears in no hurry situations..
ie, now have less tendency to load the motor
and for a shorter time per gear..
theres a general minimal but noticeable
throttle use which doesnt effetively change
how i ride over the same routes but could be
described as 'smoother', perhaps..

this was obvious when taking her out for her
first test runs with the new lv slip on installed,
but instead of just riding and listening
ive noticed myself making small changes
to lessen the bark of loaded throttling..

still let her go a bit now and then
to get a feel for any changes in engine
performance etc, when there is more of
an obvious motorcycle sound..
performance wise, engine seems to 'like'
the lv slip-on.. take off is particularly clean
and smooth, incl rolling thru/exiting turns..
without dyno, she feels a touch stronger
around maximum torque range [5.5-7.5 say]
without any obvious power hit higher up..
seems to maintain a smooth flow of power
from that nice higher torque range..

taking off at predawn in my apartment area
[downhill] she has a nice not too loud low toned
idle once settle to 1500, then its easy to ease away
with soft throttle at quite acceptable speed etc
without making enemies of the neighbours..

so however a good slip-on with reducers
sounds at first doesnt need to be all its
capable of after even a couple of weeks
riding and adjusting to its different
sound and slightly different power etc..

this is meant to be somewhat reassuring
for members with some concern for
potential noise making/neighbours etc..

ps, yesterday riding past the police stn/courthouse
group of 5 or 6 uniformed police on my side footpath
didnt even look up as we eased bye [4th probably] :)
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Has any consensus developed around the subject of a lighter weight street muffler that A) does not resonate obnoxiously B) maintains polite noise levels C) is not a maintenance hassle. I don't have a burning urge to replace my stock muffler, but I had it off the bike for the first time this weekend and was negatively impressed by the extreme mass of the thing. Thankfully it is mounted down low where the weight is less noticeable.
Has any consensus developed around the subject of a lighter weight street muffler that A) does not resonate obnoxiously B) maintains polite noise levels C) is not a maintenance hassle. I don't have a burning urge to replace my stock muffler, but I had it off the bike for the first time this weekend and was negatively impressed by the extreme mass of the thing. Thankfully it is mounted down low where the weight is less noticeable.
I believe the termignoni and akra are two exhausts you should look into. Another thing is an exhaust repacking thread created not too long ago.

It seems as if you can curb most noisy exhausts with this repacking method(though it will have to be maintained because even stock exhaust packing deteriorates.

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My wish list may be a tall order. I would imagine Honda would not have done what they did without good reason. Weight = material and material = cost. I would love to know what the heck is inside the muffler that weighs so much. My thought was catalyst but it may be simply thick baffles.
Mufflers that incorporate a Cat are going to be very heavy.
I was looking at the assembly drawing for this Akrapovic.

The catalyst module looks pretty small.

The warning at the bottom is odd: WARNING! IN CASE OF COMBINATION WITH OPTIONAL LINK PIPE, MUFFLER EC TYPE APPROVAL IS NOT VALID!

If you don't use the link pipe, I'm not sure how you are supposed to attach the muffler...and if you use the pipe, you void the EC approval. I wonder if this unit even has EC approval for the CBR250R? Clicking the document link brings up a certificate that is irrelevant to the CBR250R.

Even though I live in the US, the EC approval is attractive because of what it indicates regarding the noise level.
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