Suzuki GSF400 Spark Plug
The Suzuki GSF400 (400cc) takes an NGK CR8EIX spark plug, gapped to 0.032".
Key takeaways
- Iridium plug: NGK CR8EIX.
- Iridium upgrade available in the same fit.
- Gap: 0.032 inch - set it before fitting.
- Covers 1978-1979.
Buy the plugs for your Suzuki GSF400
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 is the spark plug gap for a Suzuki GSF400?
The spark plug gap for the Suzuki GSF400 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 GSF400?
Yes. The CR8EIX is the iridium version of the null - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Suzuki GSF400
We cover the other consumables for your machine too - the exact fit, cited, in one place.