Spark Plug (NGK D8EA) | Honda CB200 / CL200

Description

Spark Plug (NGK D8EA) | Honda CB200 / CL200

The right plug for a CB200 or CL200 isn’t a guess. The correct match for these engines is the NGK D8EA — plenty of plugs will thread into the head, but the wrong heat range fouls, misfires, or runs hot. This is the copper-core D8EA that matches the CB200 and CL200 from the factory.

Why You Need This

A tired or wrong-heat-range plug is the cheapest thing to rule out when a CB200 runs rough, fouls, or drops a cylinder. The D8EA is the correct reach and heat range for the CB200 and CL200 Scrambler. Run the right plug and you get clean starts, a steady idle, and a tip you can actually read when you’re dialing in the carbs.

The CB200 and CL200 are based on the CB175, but they do not use the same plug. The CB175 / CL175 / SL175 take an NGK D8HA — if you’ve got a 175, grab our NGK D8HA for the CB175 family instead.

Specifications

Note: Sold individually — a CB200 / CL200 takes two plugs, one per cylinder. Doing carb jetting? Grab a few extra so you can pull fresh plugs and read the tip color as you tune.

Installation

Difficulty: Beginner

Tools needed: Spark plug socket (18 mm), feeler gauge

1. Each plug ships with a removable terminal nut on top. If your plug cap screws onto a bare stud, unscrew the terminal nut first to expose the threads.
2. Check the gap with a feeler gauge and set it to 0.024–0.028 in (0.6–0.7 mm) if needed. Adjust only by bending the outer (side) electrode.
3. Lightly coat the threads with a little oil, thread the plug in by hand to avoid cross-threading, then snug it with the socket.

Tip: When you’re jetting the carbs, pull a plug and read the porcelain around the center electrode — light tan to chocolate brown is correct, black sooty carbon means rich (or a dirty air filter / too-cold a plug), and a white, blistered tip means lean or running too hot.