Motorcycle spark plugs are an essential part of an engine's ignition system. The spark plug ignites the fuel and air mixture in the engine's combustion chamber, producing the energy that powers the motorcycle. Spark plugs come in different sizes and designs, depending on the motorcycle model and engine type. They require regular maintenance and replacement to ensure the engine runs smoothly and efficiently.

There are two main types of spark plugs: standard and iridium. Standard spark plugs are made of copper and are the most common type of spark plug. They are relatively inexpensive and provide reliable performance. Iridium spark plugs, on the other hand, are made of iridium and are more expensive than standard spark plugs. They last longer than standard spark plugs and provide better performance, especially in high-performance engines.