How to replace motorcycle spark plugs

If your engine is starting to run a little rough or you are having difficulty with starting your motorcycle, it could be time to replace the spark plugs. Luckily it's fairly easy to replace these components without going to a garage. Here are step-by-step instructions for how to replace your motorcycle spark plugs more easily:

Organize your tools: to get started you will just need a ratchet, a spark plug socket, a spark plug gap tool as well as a new set of spark plugs that are compatible with your motorcycle engine.

Make sure that your motorcycle has had time to cool down and you may want to place it in a paddock stand so that it can be more stable as you are working on it. Start by removing the spark plug wire and pulling off the cap. Try not to pull the cap too hard as this can damage the connection.

Put a spark plug socket to the ratchet and then loosen the spark plug counterclockwise until it's completely out. If you notice that the previous spark plug has ash, damage or oil deposits this can represent sides of another problem. Most spark plugs should be gray or yellow, clean or dry. If you're constantly corroding spark plugs this can be other signs a larger engine problem.

Gap the spark plug appropriately for your engine using a gapping tool. In most cases spark plugs will be compatible out-of-the-box. Tighten up the new spark plug with a ratchet and try to get it just half a full turn past hand tight. Place the cap back on and see if the engine fires up using the new spark plug. You may have to replace multiple spark plugs depending on the configuration of the engine.

Keep in mind that for engine maintenance like this it's often easier to have a paddock stand.

Leave a comment