Spark plug reading

[RideRed400EX]

Anyone have a link or pics of sparkplug coloring based on mixture (too rich/too lean)

Pay attention to the porcelin part of the electrode ( the part in the center) look specifically about 1/16 up ( toward the inside of the plug) white=lean, black= rich, brown= just right, plug reading is not an exact science however, just a guide. Light brown is the preferred for a mix of power & longevity.

[PaRoostR]

How about hondaex's "How to "read" a spark plug?" (http://www.hondaex.com/techtips/sparkplugs.htm)