On topic; GSXR exhaust valve

Discussion in 'UK Motorcycles' started by stephen.packer, Aug 2, 2010.

  1. stephen.packer

    stephen.packer Guest

    So, I stuck the GSXR in for a service and got a call; "The exhaust
    valve's stuck, do you want us to free it, it will cost about 20 quid in
    labour".

    My response was 'yes' (after all they're also doing the shims so 20 quid
    extra won't be noticed...)

    But I got to thinking afterwards, what does this valve actually do to
    the performance? The bike seemed to go fine with it seized.
     
    stephen.packer, Aug 2, 2010
    #1

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  2. stephen.packer

    Andy Bonwick Guest

    Throw the piece of shit out of there.

    You don't see them fitted to race bikes so what's the point in having
    one on a road bike you intend to ride fast? I'm always suspicious
    about something that cuts in at just about the same RPM as noise and
    emission testing is carried out and treat them in much the same way as
    timing retarding devices.
     
    Andy Bonwick, Aug 2, 2010
    #2

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  3. stephen.packer

    Krusty Guest

    Changes the exhaust pressure wave to give more mid-range. Or something
    like that.
     
    Krusty, Aug 2, 2010
    #3
  4. stephen.packer

    Hog Guest

    I dunno but a 1000EXUP with a working valve is a lot nicer road bike than
    one without
     
    Hog, Aug 3, 2010
    #4

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