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bigredhead
10-27-2004, 04:06 PM
http://www.strappe.com/plugs.html

Long, but good read !!!
bigredhead
10-27-2004, 04:28 PM
http://www.off-road.com/dirtbike/tech/2002sparkplug/

another one.
bigredhead
10-27-2004, 04:31 PM
Quote: The amount of heat a plug brings into an engine due to the electrical sparks is so small it’s insignificant. The amount of heat a plug removes from an engine is also small.

Those ratings - “hot” and “cold” - mean simply this: a plug becomes very hot in an engine, so we say it’s a hot-running plug — or just hot. Another plug doesn’t reach such a high temperature, so we say it’s a cold-running plug — or just cold.