What is the lifespan of a motorcycle spark plug?
2 Answers
Motorcycle spark plugs should be replaced every 20,000 kilometers. Steps to replace a motorcycle spark plug: First locate the cylinder head position, find the spark plug cap, and remove the spark plug cap. Before removal, use an air gun to clean the surrounding area to prevent debris from falling into the combustion chamber through the installation hole when removing the spark plug. Use the onboard/special tool to unscrew the spark plug counterclockwise. If a dedicated removal tool is not available, a wrench can also be used to turn it counterclockwise. Remove the spark plug body by hand and begin inspection and cleaning. Since onboard tools lack magnetic attraction and a fixed base, the spark plug may drop during removal. After removing the spark plug body, install the new spark plug by following the original steps.
The lifespan of motorcycle spark plugs really depends on the specific situation. For someone like me who rides a small scooter to commute every day, the factory spark plugs start to show signs of weak ignition after about 15,000 kilometers. However, I met a long-distance touring expert on my last trip who said his iridium spark plugs lasted a solid 30,000 kilometers. The key is to pay attention to the riding conditions: frequent stop-and-go traffic is the hardest on spark plugs, causing severe carbon buildup; riding in the rain often leads to electrode oxidation; and if the exhaust pipe has been modified without proper matching, it can also shorten the lifespan. I recommend checking the electrode gap monthly. If you notice difficulty starting or a sudden increase in fuel consumption, replace them immediately. After all, a spark plug only costs a few dozen bucks—way better than breaking down on the road.
