NGK D7EA Spark Plug

NGK D7EA Spark Plug | Honda CB500K / CB550

The NGK D7EA is the correct spark plug for the Honda CB500K, CB550K, and CB550F inline-four engines. Sold individually — you need four plugs per bike.

Why You Need This

The CB500K and CB550 use a different spark plug than the Honda twins. If you're buying an old CB500 or CB550, there's no telling what plugs are in there — and just because a plug threads in doesn't mean it's the right one. The D7EA is the Honda-specified copper-core plug for these engines. If you're doing carburetor tuning, keep a few sets on hand to read the plug tip color and gauge your fuel mixture.

Specifications