plug is sooty black...........

Just got my bike out of the shop a couple of days ago.04 WR450. Had them jet it for me, 165 main, 48 pilot, 40 leak, jd red #4 clip.......all the free mods with a full GYT-R exhaust. They put in a "NGK CR9E" factory is CR8E......I am going out the door to put a 160 in it.....any other suggestions?????????????

300'alt

93-103

high humidity

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