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Thread: Airbox Induction Roar has become a Shriek

  1. #1
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    Airbox Induction Roar has become a Shriek

    Hey all.

    Since putting my bike back together I have noticed that the induction roar it used to have has become more of a shriek than a roar.

    I'm picking that there's some air getting in somewhere and will take the tank off this weekend to have another look at it as I couldn't find it last time.

    What's the most likely culprit? The air filter area, or the rubber boots that fit onto the carbs?
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

  2. #2
    Have you seen your cat lately? could be someone wants to get out?
    In and out of jobs, running free
    Waging war with society

  3. #3
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    Quote Originally Posted by Motu
    Have you seen your cat lately? could be someone wants to get out?
    Yes, that was my first thought.

    But seriously, can I use an RTV-like substance to seal the rubbers on to the carbs?

    Is completely sealing the airbox a good idea? I'm wondering if my off has resulted in a small crack in the airbox...
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

  4. #4
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    Quote Originally Posted by celticno6
    But seriously, can I use an RTV-like substance to seal the rubbers on to the carbs?

    Is completely sealing the airbox a good idea? I'm wondering if my off has resulted in a small crack in the airbox...
    The whole system's designed to fit together nicely, so you shouldn't need to use sealants. Having said that, there are some parts that are stuck together that way anyway, like rubber flanges in the airbox, the 'snorkel', etc. But using RTV on the carb boots isn't a good idea in case a bit of RTV comes adrift and gets sucked up. Most (all?) of the glued/siliconed bits are generally upstream of the filter, so no problems there.
    If there's a crack in the airbox, you should be able to weld or glue that.

    Anyway, it's all academic until you do some exploratory surgery, but more'n likely it's just some boot/flange/doodackey that's come slightly adrift.
    ... and that's what I think.

    Or summat.


    Or maybe not...

    Dunno really....


  5. #5
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    Or alternatively you've reassembled it correctly and that is how it is supposed to sound.
    If a man is alone in the woods and there isn't a woke Hollywood around to call him racist, is he still white?



  6. #6
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    Describe this shriek for us...
    "Standing on your mother's corpse you told me that you'd wait forever." [Bryan Adams: Summer of 69]

  7. #7
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    Quote Originally Posted by Hitcher
    Describe this shriek for us...
    Before my accident, the bike used to sound like rrrrrroooooaaar.


    Now it's like rooooooaaaaaaeeeeek!!!!

    You are taking the piss aren't you.
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

  8. #8
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    Quote Originally Posted by celticno6
    You are taking the piss aren't you.
    I thought that what the fault sounded like may be a useful diagnostic technique -- particularly for those with a practiced ear...
    "Standing on your mother's corpse you told me that you'd wait forever." [Bryan Adams: Summer of 69]

  9. #9
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    Quote Originally Posted by celticno6
    Before my accident, the bike used to sound like rrrrrroooooaaar.


    Now it's like rooooooaaaaaaeeeeek!!!!
    The answer's obvious. You're scaring it.
    kiwibiker is full of love, an disrespect.
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  10. #10
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    Quote Originally Posted by Hitcher
    I thought that what the fault sounded like may be a useful diagnostic technique -- particularly for those with a practiced ear...
    Okay then, I'll continue.

    Said problem is occuring between 3500 and 5000 rpm, about when the bike starts to pick up its power and head towards something approximating decent acceleration.

    Could be related...

    Then again, could be you just don't notice the noise at 9,000+ cause there's other things causing noise.
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

  11. #11
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    Quote Originally Posted by celticno6
    Before my accident, the bike used to sound like rrrrrroooooaaar.


    Now it's like rooooooaaaaaaeeeeek!!!!

    You are taking the piss aren't you.
    Can you record it and post it up on here? And I mean your version - not the one the bike makes - I need some entertainment today

    NOW I AM TAKING THE PISS

  12. #12
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    Quote Originally Posted by jrandom
    The answer's obvious. You're scaring it.
    I present the following webpage as evidence the mighty fizzer is scared on nothing. Mr Mike Doohan at Bathurst on a 1987 FZR750RT:

    http://www.mcnews.com.au/Features/20...988/doohan.htm
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

  13. #13
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    Quote Originally Posted by wkid_one
    Can you record it and post it up on here? And I mean your version - not the one the bike makes - I need some entertainment today

    NOW I AM TAKING THE PISS
    Exactly when are you going back to work, wkid?
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

  14. #14
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    hopefully AFTER you have posted your verbal impression of the induction noise.

  15. #15
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    Quote Originally Posted by wkid_one
    hopefully AFTER you have posted your verbal impression of the induction noise.
    Bugger. No microphone on the work PC
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

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