What is the torque for a motorcycle spark plug?
1 Answers
Generally, the tightening torque for a motorcycle spark plug is 20N·m. Spark plugs of different sizes require different torque levels. For example, a 12mm spark plug typically uses a torque of 20-25N·m, while a 14mm spark plug requires a torque of 25-30N·m for tightening. What is a spark plug composed of: A spark plug mainly consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell. What are the types of spark plugs: The main types of spark plugs include: standard spark plugs, projected insulator spark plugs, electrode spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-gap spark plugs. How does a spark plug work: Under high voltage, the air between the center electrode and the side electrode of a spark plug rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain level, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties and forming a discharge channel, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body, known as a "spark." Along with the heat expansion, a "crackling" sound is also produced. The temperature of this electric spark can reach as high as 2000-3000°C, which is sufficient to ignite the air-fuel mixture in the combustion chamber of the cylinder.
