Going from 2.7k feet to 7800+ - 98 yz400f

1 reply to this topic
  • Deadend

Posted July 15, 2011 - 04:19 PM


Didn't see any jet info in the archives for the yz400F

Any suggestions? Thanks in advance!

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  • grayracer513

Posted July 15, 2011 - 04:44 PM


Multiply the size numbers of your current pilot and main jets by .95 and use the nearest size. For instance, 165 x .95 = 157, so a 158 or 160 should be OK.

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