The lifespan of a motorcycle spark plug can vary depending on several factors, such as the type of plug, the motorcycle's engine, and the riding conditions. While some spark plugs are designed to last longer, it is generally recommended to replace them more frequently than every 15,000 miles.
In most cases, motorcycle spark plugs should be replaced approximately every 8,000 to 12,000 miles, or as specified by the manufacturer in the motorcycle's owner's manual. This interval ensures that the spark plug continues to provide reliable ignition, optimal fuel efficiency, and good engine performance.
If you have been using the same spark plug for 15,000 miles, it is advisable to replace it as soon as possible. Over time, spark plugs can become worn, resulting in reduced performance, misfires, and decreased fuel economy. Replacing the spark plug regularly helps maintain the proper combustion process, which is essential for the smooth operation of your motorcycle's engine.
It's worth noting that if you are using specialized spark plugs, such as iridium or platinum plugs, they often have a longer lifespan and may be replaced at intervals of 20,000 to 30,000 miles. However, it's always best to consult your motorcycle's manufacturer or refer to the spark plug manufacturer's recommendations for the specific plug you are using.
Regular maintenance and timely replacement of spark plugs contribute to the overall health and performance of your motorcycle's engine.