The Truth About Aftermarket Exhausts | MC Garage - BMW F800 Riders Forum & Registry



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  1. #1
    Daboo's Avatar
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    I stumbled upon this today and decided to share it.



    Chris
    Elnathan - 2014 BMW F800GT
    IBA# 49894 True Rounder = 0-20's - Rounder -- to -- 100's+ Red Hot Rounder

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  4. #2
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    Totally 100% agree. I fitted my Remus slip on for style and to save (a lot of) weight. The sound is deeper but certainly not offensive. On my older bikes I have found amazing differences in power, sound and weight. The biggest difference was on a 1950s British V twin. Just changing the silencer added 10 BHP at the rear wheel. By adjusting jetting it came to 15 BHP. That equates to over 25% increase. The noise difference was noticeable but not offensive. I also obtained better mid range roll on throttle response which equates to torque.

  5. #3
    notacop is offline The original Schwartz Wald Troll
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    "Not offensive"

    To whose ears? That great blat of exhaust may be music to your ears but why does everyone else have to know your motor is running?

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  8. #4
    Daboo's Avatar
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    I wish I knew what the first owner had done to my bike. Some of the things are obvious, like lowered foot pegs and bar risers. But I suspect his friend that worked on the bike did something to the exhaust because it sounds very nice, yet looks OEM. A friend who had a GT listened to mine and commented that if his had sounded like that, he wouldn't have spent the $$$ for an aftermarket exhaust.

    Chris
    Elnathan - 2014 BMW F800GT
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  9. #5
    308bever's Avatar
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    it`s gotta sound nice, if it actually makes the bike go harder that`s a bonus (((-;

  10. #6
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    Quote Originally Posted by notacop View Post
    "Not offensive"

    To whose ears? That great blat of exhaust may be music to your ears but why does everyone else have to know your motor is running?
    Well actually to most. My wife has even commented that it is a bit deeper sonance and not objectionable . I always temper the throttle in residential areas
    and run in a higher gear to minimise noise. IMHO nothing compares to the noise of a 450-500cc single dirt bike and aftermarket pipes with regards to offence. They are just
    painful.

  11. #7
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    I just sent a link to the YouTube video of the chase scene in Bullet to my son-in-law yesterday. Louder exhausts don't have to be objectionable. And mine on my GT, isn't as quiet as most, but has a pleasant deep sound.

    It's the straight pipes, or similar that I find objectionable...that and the rider who goes back and forth, back and forth about a mile from my place that I can hear clearly on a summer evening.

    Chris
    Elnathan - 2014 BMW F800GT
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    I live near Milwaukee. I doubt this video will get much play time here.

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    Oh man, the chase scene in Bullitt. One of my all time favorites.
    I sure wish I could drive like Bill Hickman. Or even as good as McQueen.
    07 F800 ST 

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    Quote Originally Posted by notacop View Post
    "Not offensive"

    To whose ears? That great blat of exhaust may be music to your ears but why does everyone else have to know your motor is running?
    This is a very fair point. I have an aftermarket can much louder than stock it is within noise limits for the UK but not the rest of the EU. I fitted it for one reason, to get me heard in traffic you can have all the hi viz kit and aux lighting in the world but if somebody does not look they will not see you, sound on the other hand seems to permeate better. I came to this conclusion when traffic filtering (lane splitting) on a stretch of four lane UK motorway, traffic was stop/start doing max 10 mph, rider approached from my rear on a modern triumph with a loud exhaust, he was just announcing his prescience well before his arrival. Not suggesting it's an alternative to safe ridding but I think it can make a difference. I'm a little embarrassed as to how antisocial it is but concerns about my safety take priority.
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  18. #11
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    Had a ZX6R 636 with a Two Brothers "shorty" and a resonance chamber eliminate pipe. It was LOUD but sounded really good at high RPS. Mrs. hated it, even after I put the insert in it. Everyone heard me coming and going! In my neighborhood I would use low revs and very light throttle but it was still loud. At the time I worked downtown and parked in the corporate parking deck. One of the guards told me it was the loudest bike he had heard in the deck, even louder than a HD with straight pipes. On a longer ride it was vey annoying. Don't know if it had been tuned or not. After 2 months I traded it on one with ABS. I don't do any lane splitting - people here art used to motorcycles much less motorcycles going between cars. I like a good exhaust but not worth the expense on the F800GT to me.

    A lot of sport bike folks will knock out the catalytic converter which reduces back pressure and gives it a lower tone but as pointed out in the video doesn't increase the performance. My 1st ZX6R did seem a bit more responsive but could have been in my mind.

  19. #12
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    A friend bought a 2014 CBR1100 with aftermarket exhaust (from cylinder head to exhaust tip), and the original parts were also included.

    After riding several months he was suspicious the bike was really lame at mid-RPM so he reinstalled the stock exhaust. And proved his suspicion correct. Top speed with aftermarket was 109 MPH. Original exhaust only 103 MPH. But at lower speed it was much more ridable. Stock stays.

    I don't buy the claims of "louder to be heard in traffic." I never hear loud bikes unless they are ahead of me.
    2016 Yamaha FJR1300A; 2016 Beta 430RS; 2007 BMW F800S; 2009 Husaberg FE450; 2016 Subaru Outback; 2018 F150; 2013 Tesla Model S 85; 1983 Porsche 928S; 9 cats 

  20. #13
    notacop is offline The original Schwartz Wald Troll
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    " to get me heard in traffic"

    That has to be the lamest reason yet. All these trucks and cars and buses and you are blating your throttle so that they can take note of your presence? I realize that is the HD argument for loud exhausts but it's still lame. More care on your part minding what is going on in said traffic may serve you better.
    In some 500+ thousands of miles of motorcycle riding I've found few reasons for a horn on the bike much less a loud exhaust to save my life. On a few bikes the only time the horn sounded was when i wondered what "This" button was for and tried it.
    In justification of loud pipes the only thing I find them useful for is to set off car alarms with the low rumble. That's kind of a dubious reason too.

  21. #14
    The Mariner's Avatar
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    There's nothing wrong at all with wanting to make your bike sound better to your ears. It's all part of your personal enjoyment & there's no absolutely need to have to justify it further with the 'loud pipes save lives' argument.

    If you are doing it for safety reasons alone you would be far better off spending your $'s on better riding gear & riding courses to improve your abilities.
    Regards,
    Phil. 

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