Valve Spring Compressor For yz400f

5 replies to this topic
  • Markopolo400

Posted April 10, 2007 - 07:06 PM


Will this valve spring compressor work for a yz400f?

I measured the outer diameter on one of the valves and got 19.76mm, I just don't know if the 19mm attachment would fit. :thumbsup:


  • grayracer513

Posted April 10, 2007 - 07:53 PM


The question is what the diameter of the retainers and the lifter bores are.

  • Markopolo400

Posted April 10, 2007 - 08:08 PM


Oh, that's the part I didn't understand.

I'll go measure them.

Thanks Gray.

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  • Markopolo400

Posted April 10, 2007 - 08:14 PM


The lifter bore is around 22.75mm and the od of the retainer is around 19.25mm.

So I don't know if the 23mm-21.5mm adapter would work?

  • grayracer513

Posted April 11, 2007 - 02:09 PM


Probably the 19mm.

  • Markopolo400

Posted April 11, 2007 - 06:22 PM


Ok. Thanks Gray.

Now I just need to get my 400 rebuilt and back together. :thumbsup:

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