yz400f suspension swap

10 replies to this topic
  • markcjr

Posted April 09, 2014 - 07:48 PM


I have a 98 yz400f that I had the suspension done on.  Can I just swap the front and rear suspension to my 99, which needs suspension work (98 is just a parts bike)?

I read the 99 had a different leverage curve ratio, or something to that effect, so I wasn't sure if the rear shock stroke etc were the same.





  • markcjr

Posted April 13, 2014 - 08:12 AM


Yay? Nay?

  • markcjr

Posted April 13, 2014 - 01:00 PM


beuller.  i'm guessing it doesnt' matter

  • grayracer513

Posted April 13, 2014 - 05:34 PM


The suspension units should be interchangeable.

  • markcjr

Posted April 14, 2014 - 09:44 AM



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  • zagbeat

Posted April 04, 2015 - 05:25 PM


Hey, Grayracer I think Ive read you mention using a newer rear shock in a 400. Is there a certain range of years that the rear shock fits into the 400?

  • grayracer513

Posted April 04, 2015 - 06:17 PM


'09 and earlier, as far as I know. 

  • zagbeat

Posted April 04, 2015 - 07:44 PM


Thank you. And does that go for the bottom linkage as well?

  • zagbeat

Posted April 04, 2015 - 11:40 PM


one more question. does that year model range (98-09) include y250 and yz250f shocks?

  • grayracer513

Posted April 05, 2015 - 06:46 AM


Thank you. And does that go for the bottom linkage as well?




one more question. does that year model range (98-09) include y250 and yz250f shocks?


Don't thinks so, but you could measure a couple out.  The form factor is the same, but the length and eyelet dimensions might vary on other models.  Shocks from a lighter bike would be valved wrong, too.

  • zagbeat

Posted April 05, 2015 - 11:13 AM


as always , you've been super helpful.  thank you.


it seems like most of the 450 shocks from newer models (09 and older) measure approx 19.25. oem on my 98 is 19, I believe. this difference will just result in a slight change in seat height, correct.?

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