Noise limits With a Yoshi R77 end can

Discussion in 'Trackdays' started by Remal, Mar 27, 2014.

  1. Remal

    Remal It's ME
    Staff Member

    Joined:
    Jan 23, 2011
    Messages:
    14,565
    Likes Received:
    3,679
    Looking at booking a trackday or 2.

    Just wondering who has a Yoshi R77 on a 11 plate or similar and what results you are getting with noise limits etc... with or without the Baffle in.

    Just to give me a idea of what I can look at. I have a noise tester and will try it out over the weekend BUT as yet never been tested at a circuit.
     
    #1 Remal, Mar 27, 2014
  2. sinewave

    sinewave God Like

    Joined:
    Jan 12, 2013
    Messages:
    8,134
    Likes Received:
    4,614
    They test at 1m from end of Can at a steady 5500 rpm for a Thou.
     
    #2 sinewave, Mar 27, 2014
    • Like Like x 1
  3. And7rp2

    And7rp2 Elite Member

    Joined:
    Apr 11, 2011
    Messages:
    1,018
    Likes Received:
    1,074
    Used the blade the other week at oulton park 101db with baffle, 104db without ,using a 2000 mile old carbon R77
     
    #3 And7rp2, Mar 27, 2014
    • Like Like x 2
  4. Garyb

    Garyb Moderator.
    Staff Member

    Joined:
    Oct 11, 2011
    Messages:
    4,962
    Likes Received:
    3,587
    This could answer my problems from yesterday?

    Tester wanted 7000 rpm for the 750.

    After my second fail, I took a bit more notice of what was going on and no way was the guy with the what ever it was he was holding "but it was about to be inserted in a place that google censorship won't allow me to say"
    From where I observed he appeared to be much closer than one meter?

    Perhaps sheds some light as to why And7rp2 had to do 300ml of brand named fizzy drink in 10 seconds flat :)
     
    #4 Garyb, Mar 27, 2014
  5. sinewave

    sinewave God Like

    Joined:
    Jan 12, 2013
    Messages:
    8,134
    Likes Received:
    4,614
    It's a common misconception Gary that the noise sensor/microphone is located at the end of the 'Wand' that the Noise Tester waves about, it isn't!

    The end of the Wand is a datum point which is rested or touched at the end of the Bikes Can.

    The actual receptor/sensor is located exactly 1 meter back up the wand! ;)
     
    #5 sinewave, Mar 27, 2014
    • Like Like x 2
  6. Garyb

    Garyb Moderator.
    Staff Member

    Joined:
    Oct 11, 2011
    Messages:
    4,962
    Likes Received:
    3,587
    Thanks for clearing that one up for me J.
    So basically I'd have to shove it up "that place google censorship won't allow me to type" quite a way for the full effect then wouldn't I. :D


    :edit:
    What about the revs though?
    Saying a litre bike is asked for 5500rpm & a 750 required 7000rpm
    Bit excessive isn't it?
    Or was it a conspiracy to try and wipe the stupid grin off me mush:D
     
    #6 Garyb, Mar 28, 2014
  7. Remal

    Remal It's ME
    Staff Member

    Joined:
    Jan 23, 2011
    Messages:
    14,565
    Likes Received:
    3,679
    most tracks want 1mtr away at 5,5000 revs but castle combe want 0.75Mtrs away at 3/4 ravs so why it's so hard to get on my local track
     
    #7 Remal, Mar 28, 2014
  8. navvy10

    navvy10 Well-Known Member

    Joined:
    Sep 3, 2012
    Messages:
    2,254
    Likes Received:
    969
    5.5k without baffle 101db carbon Yoshi R77 back box

    Full system came out at 99db 2weeks ago interestingly also without baffle.

    Please note baffle really restricts power output compared to without
     
    #8 navvy10, Mar 28, 2014
    • Like Like x 1
  9. sinewave

    sinewave God Like

    Joined:
    Jan 12, 2013
    Messages:
    8,134
    Likes Received:
    4,614
    Not sure how they come up with the minimum Rev test points on various CC Bikes?
     
    #9 sinewave, Mar 28, 2014
  10. BlackDevil

    BlackDevil God Like

    Joined:
    Dec 13, 2011
    Messages:
    6,741
    Likes Received:
    2,019
    Akrapovic Slip on without DB-Killer in Silverstone ( May 20th ) ?

    Or do I have to install the DB-Killer ?

    Couldn't find anything about the Akrapovic Slip on noise.

    Found it !

    http://1000rr.co.uk/trackdays/16403.htm

    Thanks Nick Blade RR !
     
    #10 BlackDevil, May 14, 2014
    Last edited: May 14, 2014

Share This Page