07-11 WR450F - All Mountain Jetting?

2 replies to this topic
  • n16ht5

Posted May 26, 2012 - 08:32 AM


What are you guys jetted at for mountains?

I will be riding 500ft-9000ft this summer when the snow melts, need good all mountain jetting for it.

Free mods,
07 YZ450F pipe W/ 09 YZF header
O ring mod

Current jets-

42(?) leak
3rd clip on needle(?)

Runs great now but worried it will puke its guts at 7-9000ft

Posted Image

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  • Rocky739

Posted May 26, 2012 - 09:05 AM



FCR jetting guide

  • KennyMc

Posted May 26, 2012 - 02:19 PM


The only difference in my jetting is the 168 main I have been running since the beginning on my '07. I have ridden it up to 9,500'. Just adjusted the fuel screw a bit but that is all. Has run like a champ.


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