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02 cr 125 jetting help

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its an 02 cr125 that is fouling plugs at 1/2 to full throtle.jd jet kit,420 main,red needle in groove 5(groove the the bike has no power in mid throttle but runs good in groove 5),32.5 pilot jet.air fuel 1 3/4 turn out.what should i change out now.thanks.

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needle in position 5?? that means the bike is running real rich right? unless thats stock idk. I would set the needle to factory. 1/2-full thorttle is the main jet.

all i can help you form here, i have an rm

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