Question about 1989 kawasaki GPX 250 R

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Im adjusting the tappits on the motor

I havent started yet and I dont have a manual.

So I would like to know: a What type of adjusters are they. b What is the gap size to adjust to. c And is there any other things to watch out for on this model

Any advice would be gratfully accepted


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  • Gillyguts Nov 29, 2008

    Thanks Acetycholins. I couldn't have hoped for better advice.

    all the best Dude!



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They're not tappets--you can adjust them with a wrench and a set of feeler gauges. Here are the clearance measurment numbers for intake and exhaust:

  • 0.08mm - 0.13mm for the intake valve clearance
  • 0.11mm - 0.16mm for the exhaust valve clearance

There is much more helpful information on this web page:

Click on the link "How do I adjust the valves?"

You will also find lots of valuable information on your GPX 250 (called a "Ninja 250" or "EX 250" in America) on this web site:

Good luck!

Posted on Nov 28, 2008

  • acetycholins Nov 28, 2008

    Hi Gillyguts,

    I found a manual online. You can download it for free using bit torrent from this site:



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