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Yz 125 2002 jet size?

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My manual says that a 350 is stock jet size but my bike has a 410 in it and was running rich and i checked needle height and it liked one more notch being bottomed out and I lowered it to the last notch and bike is running pretty good in my opinon plug looks a little oily not dry white or nothing has any body got any suggestions?

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Aftermarket pipe? Rad valve? Those can make it need a bigger main. Is it stock cylinder size? Have you messed with the air screw at all? Whats the pilot size?

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Aftermarket pipe? Rad valve? Those can make it need a bigger main. Is it stock cylinder size? Have you messed with the air screw at all? Whats the pilot size?

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Aftermarket pipe? Rad valve? Those can make it need a bigger main. Is it stock cylinder size? Have you messed with the air screw at all? Whats the pilot size?

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