Uncorking Closedcourse Competions Modificaitons What Else?

4 replies to this topic
  • o2golfpar

Posted March 14, 2009 - 06:36 AM


Spring has arrived and I will be picking up my new 2008 WR450F next week. I plan on following the [COLOR="Blue"]Yamaha Wrench Report "Competition Performance Modifications." [/COLOR]

[COLOR="Blue"]What else will I need or want to do to get my bike set up?[/COLOR]

Mostly back woods trailing riding.

Thanks for the input.

See you on the trails.

  • erickdj

Posted March 14, 2009 - 07:30 AM


It all depends on what you want/expect from the bike. Reading the stickies at the top of the thread list will tell you most of what you want to know. I don't know which "Wrench Report" you read, but getting the AIS removal kit from yamaha is a good start, along with removing the entire muffler baffle.

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  • Krannie McKranface

Posted March 14, 2009 - 06:26 PM



  • o2golfpar

Posted March 17, 2009 - 01:25 PM


Yes i will be jetting. Planing on the JD Jetting. another question i have is
should i also do the removal of the AIS...Smog Removal.

How often will i need to Check the Valves?

Thanks for the assistnace from all.


  • William1

Posted March 17, 2009 - 02:10 PM


Also read this thread. I know it is long, unfortunately, but it has loads of good info.

O-Ring Mod and AP Tuning


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