Customizable motorcycle spark plug

Why does the motorcycle spark plug turn black? 1. Internal wear, including camshaft, piston ring, valve and timing chain. The wear of the timing chain, camshaft and valve will change the original valve timing, causing slight deviation, and sometimes affect the opening of the valve. The wear of the piston ring will affect the compression of the engine, and will also burn oil. Therefore, many times the blackening of the spark plug due to no external reason can be found, which is actually a reminder of the wear of engine accessories. Of course, after the wear of these motorcycle engine accessories, The sound of the engine will also change. 2. The ignition is abnormal. As we all know, the motorcycle ignites the mixed gas through the ignition system, and the ignition system will have an ignition time and intensity. If any of them deviates from the original design, it will cause insufficient combustion, which will lead to the blackening of the spark plug.