When the insulator of the motorcycle spark plug is kept at a temperature of 500-600 °C, the oil droplets falling on the insulator can be burned immediately without forming carbon deposits. Above this temperature, it will burn prematurely, and below this temperature, there will be carbon deposits.

Some motorcycle spark plugs have a small heating area, fast heat dissipation, and low temperature, which are called cold type spark plugs, which are suitable for high-speed and high-compression ratio high-power engines. Spark plugs are suitable for low-power engines with low-speed and low-compression ratios.
The calorific value of the motorcycle spark plug represents its heat dissipation speed. The larger the value, the faster the heat dissipation. Different engines require the use of matching spark plugs. Generally, the speed is fast, the speed is high, and the cylinder compression ratio is high. The spark plug with a high calorific value needs to be used, and vice versa. Of course. There is also a resistance spark plug, which is to install a ceramic resistor inside the spark plug, which can effectively reduce the damage to the ECU on the EFI vehicle by interference.
Through the above introduction and analysis of the features of motorcycle spark plug, hope it helps you.