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How Does a Motorcycle Work?

Spark Plug

  • Motorcycle Spark Plugs provide the spark necessary to ignite the air-fuel mixture in the engine to cause combustion.
  • Some Spark Plugs are readily visible as in this Sportster picture. Others are completely hidden behind plastic and other bodywork.
  • There can be more than one spark plug for each cylinder.
  • There is a technique for replacing and tightening a spark plug.

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