Part: Honda CB500K / CB550K/F Spark Plug NGK D7EA
Why You Need This: Changing the spark plugs after buying an old bike is a no brainer. There's no telling if the correct ones are in there, and just because it fits the head does not mean that it is the right spark plug. These NGK D7EA are the correct spark plugs for the CB500K, CB550K and CB550F engines. If you are doing some carburetor tuning get a few sets to read the color based on fuel mixture. If you're replacing the boots while you're at it, we got long and short ones. Sold individually, four are needed per bike.
Installation Tip: Each spark plug will come with a terminal nut on it so unscrew the terminal nut on top of the plug to expose the threads. More information can be found in our article on how to remove the spark plug terminal nut. Gap the plugs to .030", use a dab of light oil on the threads and tighten till snug.