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jetting help needed for 04 yfz450 with athena

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I just got my athena 478 kit together and i need to get it the bike jetted. i was wondering if anyone knows what jettingh i should do. i already have a full exhaust open airbox with k&n and prefilter and a rev box and its jetted for them but i dont know what at. the elevation is around 1250. thanks for the help

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Have no idea what jetting you have so I can't advise you there, but the effect of making rhe engine bigger will be almost no change, very slightly richer so I would break it in with the jetting you have (assuming it ran good before)

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