NGK Single Iridium Spark Plug Box of 4 (CR9EHI-9)

This is an NGK 6419 Laser Iridium spark plug, designed as an OE replacement for many Honda motorcycles from 1988 to 2007. It's built to offer a good balance of performance and how long it lasts, ensuring your engine runs smoothly and reliably.

The center electrode uses an iridium alloy, which is much harder than platinum and has a very high melting point. This means it can handle the heat and stress of combustion better, leading to a more consistent spark over time. The pure alumina ceramic insulator helps with heat transfer away from the plug, and the trivalent metal plating on the body helps prevent corrosion and seizing, making it easier to remove later on. For vehicles with distributorless ignition systems, it also includes a platinum pad on the ground electrode for even wear.

This plug is sold individually, but it's recommended to order in boxes of four for multi-cylinder engines. It's a solid option if your Honda motorcycle originally came with fine wire iridium spark plugs.