What is the impact of motorcycle spark plugs on motorcycle performance?

1. Kinetic energy and combustion efficiency
As the motorcycle spark plug electrode wears or carbon deposits increase, the electrode gap gradually expands (normal value 0.6-1.3mm), resulting in an increase in the voltage required for ignition. When the ignition coil cannot provide enough voltage, the spark energy decreases and the mixture burns incompletely, which is manifested as weak acceleration and insufficient power when climbing. Aging motorcycle spark plugs may cause intermittent ignition failure, causing the engine to "break fire". Spark plugs that have not been replaced for a long time may even cause knocking due to electrode ablation, damaging the piston or cylinder.

2. Fuel economy
The decrease in spark plug ignition efficiency will cause incomplete fuel combustion, and some gasoline will be discharged without participating in work. Experimental data shows that spark plugs with excessive electrode gaps can cause fuel consumption to increase by 15%-20%. Poor quality fuel or driving habits of frequent starting and stopping at low speeds will accelerate spark plug carbon deposition, which further hinders ignition efficiency.

3. Starting and idling stability
Electrode wear or carbon deposition will reduce the low-temperature ignition ability of the spark plug. Especially in cold environments, the motorcycle may need to be ignited multiple times before it can start, and even need to step on the accelerator to assist. Spark plug aging leads to uneven ignition, causing engine idle jitter. In severe cases, sudden flameout may occur, threatening riding safety.