Hey Kid, Do you run any additive in your fuel or strait pump ? It may be a little lean except for the one darker brown. ( stuck valve cylinder ?) Just a thought. The old school way to read plugs was to run full throttle through the gears, once in high click off the ignition as soon as you lift the throttle and neutral the tranny, drift to a stop, then pull the plugs on the side of the road to see what they look like. From your videos looks like you have some near by road to do this on. Again this is old school,low buck tuning.
