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Jetting suggestions

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I have a YZ450F 2007 and I need a little help. I put on a slip on FMF Powercore 4 and I would like some guidance on the jetting. I have the fuel screw out almost all the way but I know that it needs to be jetted. I live in the Las Vegas area about 2000ft elevation. What would be good so I can get the best performance out of my beast? Any help would be great thanks.

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