Just need some opinions on how this plug looks to you all. It's out of a 2003 yz 450. The plug was pulled before i just got it running again, so the results of this are from the previous ride (30mins) before i noticed i lost a water pump seal. It was run thru the full range. But was backfiring a bit on a completely shut off throttle. i'd say this was too lean if i was going off what my old 2 strokes used to look like. this is my first 4 stroke, so i'm a bit clueless.
does this seem to be burning ok? (two pics)