Suzuki GS400 Spark Plug
The Suzuki GS400 (400cc) takes an NGK CR8EK spark plug, gapped to 0.032".
Key takeaways
- Spark plug: NGK CR8EK.
- Iridium upgrade: NGK BR8EIX.
- Gap: 0.032 inch - set it before fitting.
- Covers 2003.
Buy the plugs for your Suzuki GS400
The standard plug is the exact-fit replacement. The iridium version drops into the same spot, lasts longer, and fires a little stronger for a few dollars more. Many engines take more than one - check how many cylinders you have.
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Frequently asked
What spark plug does a Suzuki GS400 take?
The Suzuki GS400 takes an NGK CR8EK spark plug, gapped to 0.032 inch. The iridium upgrade is the BR8EIX.
What is the spark plug gap for a Suzuki GS400?
The spark plug gap for the Suzuki GS400 is 0.032 inch. Check and set the gap before fitting a new plug - most powersports plugs need a small adjustment out of the box.
Can I use an iridium plug in a Suzuki GS400?
Yes. The BR8EIX is the iridium version of the CR8EK - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Suzuki GS400
We cover the other consumables for your machine too - the exact fit, cited, in one place.