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  1. #1
    I'm Canadian!
    Join Date
    Apr 2003
    Location
    Milton, Ontario

    Why bikes sound different.....

    Simple question for discussion.

    Why does the exhaust note of a headered ZRX sound so different from a headered Z1.

    If you put the exact same pipe on both bikes they would likely sound different. How come?

    Pops
    Size matters, good thing I drive a huge bus.

  2. #2
    2009 Hooligan of the year
    Join Date
    Sep 2001
    Location
    Austin, TX

    Re: Why bikes sound different.....

    Many, many factors. Variances in bore/stroke, compression ratio, timing, exhaust back pressure, etc., etc., etc.

  3. #3
    Wildcat Hooligan
    Join Date
    Apr 2002
    Location
    Central KY

    Re: Why bikes sound different.....

    Two valve heads sound different than four valve heads.

    Sent from my LM-V405 using Tapatalk
    Godspeed Brian, I hope you get that Mitsubishi flyin' in heaven bro. I will always miss you.

  4. #4
    Two wheeled FREAK
    Join Date
    Sep 2001
    Location
    NY - Between thought and expression...

    Re: Why bikes sound different.....

    Air cooled vs liquid cooled.


    Sent from my iPhone using Tapatalk

    PM me for great prices on Öhlins shocks and forks!
    ZRX-1200 - 2001 #2 - 45,500 miles and counting
    Highly opinionated and somewhat twisted, or so I've been told.

    http://www.orientexpress.com + http://www.hudsonvalleymotorcycles.com - places where I used to work...

  5. #5
    Weirdly Peculiar
    Join Date
    Apr 2008
    Location
    Where am I?

    Re: Why bikes sound different.....

    More HP = bigger bangs, higher pressure when the exhaust valve opens, more exhaust gas flow. Cam timing will affect exhaust sound.
    2000 Green, 1109, Mikuni 38mm TMR-MJN's, Yosh pipe, ZX-11 cams, Pods, ZX-11 Ignitor, Kwick Kill, Tealdo Stick Coils, Wyn's Sprocket Cover, Ted's Battery Out, MonkeyPincher Rack

    2010 Concours 14 ABS Ball Coddler "The Velvet Missle", 151 HP, lots 'o mods

    "A man's got to know his limitations" Dirty Harry

    He who is right all the time is never always right.

  6. #6
    Hooligan
    Join Date
    Aug 2005
    Location
    Clarksville,Georiga U.S.A.

    Re: Why bikes sound different.....

    Quote Originally Posted by zrx24 View Post
    Many, many factors. Variances in bore/stroke, compression ratio, timing, exhaust back pressure, etc., etc., etc.
    Ditto

  7. #7
    BadAss Hooligan
    Join Date
    Aug 2001
    Location
    causing trouble near Milton, Ontario, Canada

    Re: Why bikes sound different.....

    even the length and width of the header/pipe/muffler itself
    the pressure wave dies not just go one way
    Even with that inverted Meg of yours Loud as it is there is some back and forth of the exhaust wave
    I like Akros on exes and Ti Force. Not so pleased with Brock and Kerker
    Johnnie Phatt
    Head honcho of project
    Rise of the Phoenix

    bring Dave if you must....Perko

  8. #8
    Devils’ Advocate
    Join Date
    Aug 2001
    Location
    Large and Prickley

    Re: Why bikes sound different.....

    In college the whole second floor of my dorm were Air Force brats.

    They’d hear a plane and would tell you which Air Force plane it was...

    ....I would say to my self “WTF??”

    Then a motorcycle went by and I said:

    CB750K with an RC Engineering 4:1

    ....I was right.

    ooooooooooooo

    WARNING: ELS Products MAY CONTAIN, or be Made With, Patented Parts, Tools, Components and/or Apparati. Manufacturing Facility DOES Contain Nuts.

    PayPal to: Pete@Hyper-Formance.com
    Or: www.PayPal.me/KWICK
    Pete Aronson
    315 West Elliot Road
    Suites 107-487
    Tempe, AZ 85284
    602-397-4869.

  9. #9
    President of the ZRXOA
    Join Date
    Mar 2012
    Location
    Pleasanton, CA

    Re: Why bikes sound different.....

    At the Frank Pepito rally last month, I could hear a fart outside my room and knew exactly who it was without looking.

    Arash (pronounced "our-ash")

    CAUTION - My forum posts may be worth what you paid for them!

    2005 Green RessuREXtion - Amateur 1224 & Six Speed Installation - Oct 2015 BOTM - Yamaha R6 - Aprilia RS250s

  10. #10
    Devils’ Advocate
    Join Date
    Aug 2001
    Location
    Large and Prickley

    Re: Why bikes sound different.....

    Quote Originally Posted by AV80R View Post
    At the Frank Pepito rally last month, I could hear a fart outside my room and knew exactly who it was without looking.

    Well duh....

    ooooooooooooo

    WARNING: ELS Products MAY CONTAIN, or be Made With, Patented Parts, Tools, Components and/or Apparati. Manufacturing Facility DOES Contain Nuts.

    PayPal to: Pete@Hyper-Formance.com
    Or: www.PayPal.me/KWICK
    Pete Aronson
    315 West Elliot Road
    Suites 107-487
    Tempe, AZ 85284
    602-397-4869.

  11. #11
    BadAss Hooligan
    Join Date
    Jul 2015
    Location
    Lakewood, CO

    Re: Why bikes sound different.....

    Quote Originally Posted by AV80R View Post
    At the Frank Pepito rally last month, I could hear a fart outside my room and knew exactly who it was without looking.


  12. #12
    BadAss Hooligan
    Join Date
    Sep 2012
    Location
    CT

    Re: Why bikes sound different.....

    Diameter, length, and curvature of the exhaust. Amount of packing, if any, in the can.... etc... etc...

  13. #13
    BadAss Hooligan
    Join Date
    Jul 2015
    Location
    Lakewood, CO

    Re: Why bikes sound different.....

    Quote Originally Posted by the-atc-kid View Post
    Diameter, length, and curvature of the exhaust. Amount of packing, if any, in the can.... etc... etc...
    Yes, and to follow up on AV8OR's talent of identifying flatulence, it varies on the type of fuel being combusted that passes through the baffle of the exhaust.... etc...etc..

  14. #14
    BadAss Hooligan
    Join Date
    Aug 2004
    Location
    San Jose, CA

    Re: Why bikes sound different.....

    While on topic.... anyone here knows where the Street Triple gets its whistling sound from?

  15. #15
    President of the ZRXOA
    Join Date
    Mar 2012
    Location
    Pleasanton, CA

    Why bikes sound different.....

    Intake or maybe the gear driven counter balancers needed to make 3 cylinders work without vibrating to oblivion.
    Arash (pronounced "our-ash")

    CAUTION - My forum posts may be worth what you paid for them!

    2005 Green RessuREXtion - Amateur 1224 & Six Speed Installation - Oct 2015 BOTM - Yamaha R6 - Aprilia RS250s

  16. #16
    2009 Hooligan of the year
    Join Date
    Sep 2001
    Location
    Austin, TX

    Re: Why bikes sound different.....

    Quote Originally Posted by benbaboon View Post
    While on topic.... anyone here knows where the Street Triple gets its whistling sound from?
    It's due to the gears that drive the counter balancer being straight cut. I think it sounds cool. It's similar to the unique sound of the gear driven valves of Honda's original VFR.

  17. #17
    BadAss Hooligan
    Join Date
    Aug 2004
    Location
    San Jose, CA

    Re: Why bikes sound different.....

    Yeah... I had a Street Triple and was a fan of the sound too!

  18. #18
    I used to be....
    Join Date
    Feb 2007
    Location
    Auburn, AL

    Re: Why bikes sound different.....

    KLR650 sounds like a tractor, don't care which head pipe or muffler is used. Tried a few combinations with no luck finding a combination I like, FMF Power Bomb head pipe and Leo Vince muffler is the best of the bad. Newer Yamaha R1 has a wonderful sound. Ducati v-twins are amazing. Hearing Flying Dave's SV1000 sold me on the big Suzuki V-twin, years latter I have a V-Strom 1000 with a Leo Vince and love the sound. We have run many different headers & mufflers on ZRX's they all sound similar. Currently have a Muzzy stainless header with Leo Vince megaphone. Best was a K-Factory Ti, pipes wrapped around the left side of the oil sump and exited on the right with a 200mm muffler. I am also a big fan of KTM690/Husky 701 at full song with an aftermarket pipe.

  19. #19
    CarlM
    Join Date
    Jun 2005
    Location
    Central California

    Re: Why bikes sound different.....

    Quote Originally Posted by AV80R View Post
    At the Frank Pepito rally last month, I could hear a fart outside my room and knew exactly who it was without looking.

    Alex. Duh


    You can't go faster when you are in plaster
    Mongo like candy

  20. #20
    CarlM
    Join Date
    Jun 2005
    Location
    Central California

    Re: Why bikes sound different.....

    My Super Duke with one muffler sounds diff then my SV1000 with two.


    You can't go faster when you are in plaster
    Mongo like candy


 

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