Running too close of a plug gap on a motorcycle engine can have several consequences:
Misfiring: The spark plug gap is crucial for creating a proper spark to ignite the air-fuel mixture in the combustion chamber. If the gap is too small, the spark may struggle to jump across or may not occur at all. This can lead to misfires, where the fuel mixture fails to ignite properly. Misfires can result in reduced engine power, rough running, and overall poor performance.
Incomplete Combustion: A smaller plug gap can cause incomplete combustion of the air-fuel mixture. When the spark is insufficient or weak, the combustion process may be incomplete, leading to wasted fuel, reduced power output, and increased emissions. Incomplete combustion can also cause fouling of the spark plug, resulting in decreased efficiency over time.
Overheating: A narrow plug gap can result in the spark occurring closer to the edge of the electrode. This concentrated heat can lead to increased temperatures within the spark plug and potentially cause overheating. Overheating can damage the plug, resulting in electrode erosion, pre-ignition, or even engine damage in severe cases.
Reduced Lifespan of Components: Running too close of a plug gap can put increased stress on the ignition system, including the spark plug, ignition coil, and other related components. The increased stress and heat generated by a smaller gap can shorten the lifespan of these components, leading to more frequent replacements and increased maintenance costs.
Poor Fuel Economy: Inefficient combustion caused by a narrow plug gap can negatively impact fuel economy. The unburned fuel or partially burned mixture results in wasted energy and increased fuel consumption. This can lead to reduced mileage and increased expenses for fuel.
It's important to note that the ideal spark plug gap varies depending on the specific motorcycle model, engine design, and manufacturer recommendations. It's recommended to consult the motorcycle's owner's manual or contact the manufacturer to determine the appropriate spark plug gap for your particular motorcycle engine.