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Info ZXR250 Valve shim sizes

Discussion in 'Kawasaki 250cc In-line 4's' started by Kirk, Aug 12, 2017.

  1. Kirk

    Kirk Well-Known Member Premium Member

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    This thread is to sort out the mystery of valve shim sizes of the Kawasaki ZXR250 as there are many conflicting reports on the internet whether they use the standard 7.48mm shim or a 7.9mm(8mm) shim. The differences could be a change at a certain date, difference between A and C models or the Malaysian spec could be different.

    My current bike is a 1992 ZXR250C complied in 1998 and uses a 7.9mm shim. See photos below for compliance date, engine number, picture of shim sitting on valve, and shim measurement.

    If anyone else gets a chance with a different year/model/spec ZXR250 can you please add similar so we can have this recorded for future?

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    bapiEbF.jpg
     
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  2. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club

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    1999 built 2003 imported Malaysian ZXR250C
    Frame number ZX250CC11972
    Engine number ZX250CE001935

    Fairly certain mine had 7.48mm OD shims as I recall measuring them with the verniers at work.
     
  3. aarondugs

    aarondugs Active Member

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    hey mate, both my 1989 A models use 7.48 shims, quite interesting that yours has 7.9, haven't come across that before
     
  4. Kirk

    Kirk Well-Known Member Premium Member

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    As it's an odd size I'm just wondering if over the years people have replaced with 7.48mm when they check the valve clearances? The only way to confirm would be to look at the shim sitting on the valve and see if it moves around a bit. The 7.9mm shims (precisionshims lists them as 8mm) are an exact fit.
     
  5. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club

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    Appears I am wrong. Had shims out of my spare motor today and measured them with the micrometer. 7.85mm diameter. Engine number on this one is ZX250AE014683
     
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  6. Kirk

    Kirk Well-Known Member Premium Member

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    So at least some of the A series had them as well. That just makes it more confusing and possibly not year related.
     

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