The common faults of motorcycle spark plugs mainly include ablation, overheating, carbon deposition, etc., which can directly affect the engine work and cause the engine to work unstable. Drop in horsepower, difficulty starting, etc.
When the spark plug electrode is seriously ablated in a short period of time, it should be checked whether the calorific value of the spark plug meets the specified requirements. If the calorific value is low, the spark plug with a higher calorific value must be replaced. The cause of the spark plug overheating and ablation must also be excluded at the same time, and the carbon deposits on the spark plug should be removed frequently.
Overheating of the spark plug means that the temperature of the spark plug is too high when it is working, so that the electrode of the spark plug is slightly ablated, and the electrode around the electrode is white. It will cause engine instability and power drop.
The reason for the overheating of the spark plug is that the ignition advance angle is too early, the combustible mixture is too lean and the calorific value of the spark plug itself is too low. At this time, high-speed carburetor and ignition time and spark plugs with higher calorific value should be selected.
Spark plug carbon deposition means that there are many black or gray-black deposits on the electrode of the spark plug in a short working time. In severe cases, the two poles of the spark plug are connected and short-circuited, making the engine unable to work. It is mainly caused by the too rich combustible mixture and the selection of spark plugs with too high calorific value. Therefore, the carburetor should be adjusted and a spark plug with a slightly lower calorific value should be used, and the gap between the two poles should be appropriately increased.