Question about 2002 kawasaki ZZR 250

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Oil leaks from breather box

There is a small hole on the left hand side bottom of breather box {air filter box} is it supposed to be there.oil leaks out when on side stand

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  • Anonymous May 18, 2009

    or there is to much oil in the sump the best way of alimanating this is to drain all oil remove filter to ensure there is no oil left in the sump then replace filter and replenish with about 1.6 ltr of oil as there will be some oil left in the head. if the problem persists have a compresion test carried out but the little zzr engine is more known for ruining its big ends and snapping rocker arms than kaning its rings ive had one drop valves and a dealer said that that is more or less un heard of

  • Anonymous Mar 14, 2014

    Is there supposed to be oil inside left case cover..been dropped on side and now has tiny hole in case. is there even supposed to have oil in there?

  • Anonymous Mar 14, 2014

    Rear diff leaks oil from breather

  • Anonymous Mar 15, 2014

    oil leaking from breather

  • Anonymous Mar 16, 2014

    breather box filling up with oil on 650 Quest

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  • Master
  • 404 Answers

Hi!
From your brief description It sounds like you are experiencing Crank Case pressure build up.
I presume your ZZR is of High mileage or possibly previous owners havn't serviced it regularly.
The problem being the compression Piston Rings wear and allow Blow Back gasses into the crank case there by building up pressure, this in turn sends an oil film up the breather tube to your air box resulting in your problem.
You could try an oil & filter change (Synthetic) Top jolly with maybe an additive plus similar for the fuel i.e. Red-Ex or similar, it may help but I doubt a cure.
If you want you could extend the breather pipe away from the box into a drip can or similar, be sure to filter it as you don't want to get contamination down in the cases.
Hope this sorts it for you?
Please press the Blue Button for appraisal of my FREE! Effort.
Thank You! & Good Luck.
Paul 'W' U.K.

Posted on Mar 05, 2009

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Posted on Jan 02, 2017

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