fork oil level ??

4 replies to this topic
  • davidvak

Posted June 06, 2002 - 09:18 PM


what is the fork oil level for yz400f 99` ?
i think in the book it is 130mm max but
somebody told me that it can be even 100mm max...
is that tru ???


Posted June 06, 2002 - 02:04 PM


david, true,i'm running mine @ 100mm ahhhhhhhhh the plushness...........jimbo

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  • DaveJ

Posted June 07, 2002 - 07:33 AM



A high fork oil level (a low number) means the fork will progressively get firmer as it moves further into the stroke. Aka, more bottoming resistance.

A cheap form of medical insurance when learning how to jump.

However, more oil also means the front end will not dive as much when entering a corner. The bike will push or seem top heavy. Not a good thing.

As always, it's a compromise.


  • mike_dean

Posted June 07, 2002 - 07:48 AM


My forks were done at MX-Tech and set at 95mm, works great with their valving. mike

  • gal

Posted June 09, 2002 - 06:21 AM


hi david,
whats up man? here in israel its fu@#$ng hot, it has been 42 c today n yesterday.
ok so as an answer to your question - the manual says 80mm-150mm , so if u want it 2 b hareder go up to 85mm, in 5mm intervals and check what is best 4 u

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