How Often Should the Spark Plugs of a Scooter Be Replaced?
2 Answers
The spark plugs used in scooters need to be replaced every 30,000 kilometers. Spark plugs are components of the ignition system and require regular replacement. Spark plug replacement cycle: Under normal maintenance conditions, they should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine, so it is recommended to follow the user manual. The following standards can be referenced for maintenance replacement: Platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. Steps for replacing spark plugs: Open the engine hood, lift the plastic cover of the engine, and remove the high-voltage distributor wires. Mark the position of each cylinder to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. When removing them, check for external debris such as leaves or dust and ensure they are cleaned thoroughly. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the removed high-voltage distributor wires according to the firing order and secure the cover.
I've been riding scooters for over a decade and found there's no fixed interval for spark plug replacement. Generally, changing them every 5,000 to 10,000 kilometers or once a year is the safest approach. If you do a lot of stop-and-go city riding where combustion is incomplete, spark plugs are prone to carbon buildup, which can cause hard starting or a sudden spike in fuel consumption. I used to neglect inspections until my scooter suddenly stalled—towed to the shop, they said the spark plug had burned out. Now with regular maintenance, no issues arise. A replacement isn't expensive, just tens of yuan, but maintaining good ignition helps the engine run more fuel-efficiently and last longer. When checking spark plugs, also inspect the ignition wires for aging—loose connections can cause similar failures, so don't overlook this.
