versatile Jet Kit?

I have a 2006 YFZ450 and a 2005 WR450; I have a jet kit that came with the WR but need something for the YFZ. I did research and the part numbers do not match up. What would be the difference in the jets?

If the part numbers are different, then it leads to the kits being different. Difference may be in the jets includes or the contours of the needles. The jets are interchangeable (a 160 is a 160 for a FCR).

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