engine mods?

6 replies to this topic
  • Shane_Bettin

Posted October 16, 2004 - 07:37 PM


might be doing a top and bottom end rebuild soon on my 99 yz400f. when its apart i plan on doin some mods. what are some of the best mods out there for power and price. i'd want to keep running pump gas.

  • PMK

Posted October 17, 2004 - 05:13 AM


Shane if you are doing your own work, and have the ability, buy a set of Falicon adjustable cam sprokets, and set your LC's to 105. If you are using a 450 type auto cam you'll only use the Falicon stuff on the intake. Engine wise, after jetting and carb work cam timing is an easy cheap gain.

I would recommend if replacing a crank to update to an 01 crank and gear to eliminate the key issues on the CB gear.


Sorry about the crank comment, I hadn't yet read your other post, but it is the truth.

  • YZ250F_Rider

Posted October 17, 2004 - 05:45 AM


got a link to falcon pmk?

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  • yzf450jack

Posted October 17, 2004 - 09:21 AM


http://www.faliconcr...com/crankwk.htm :cry:

  • YZ250F_Rider

Posted October 17, 2004 - 11:02 AM


cool thanks. I wonder if the adapter will press onto a hotcams intake cam.

  • HotCams

Posted October 21, 2004 - 10:12 AM


The Hot Cams for the YZ250F, and YZ400/426, already have adjustable intake sprockets. :cry:

  • YZ250F_Rider

Posted October 21, 2004 - 10:31 AM


But not for the 450's, as best I can tell in the online catalog. If you do I would definitely appreciate the info on it.

I already have both the exhaust and intake cams on both 04yz250f's. They are a huge improvement over the stock cams. :cry:

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