05 Wr 450 Set-up Question

I read about the free mods over and over again, and I need to know what size jets I need for the starter, pilot and main jets so I can order them. I have FIVE questions that I need some kind soul to answer.

What jet sizes (starter, pilot and main) are right for riding an uncorked bike at 3 to six thousand feet above sea level?

Must the needle be replaced in conjunction with the jets?

Also, is the YZ needle a viable alternative to an aftermarket part?

Is the zip ty fuel screw also necessary?

Is there a web site that sells ALL this stuff?

Your answers are much appreciated.

Yes, I have the same questions, but I ride 5000 - 8500 ft above sea level.

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