KTM 400 SX Spark Plug
The KTM 400 SX (360cc) takes an NGK BR9HS spark plug, gapped to 0.024".
Key takeaways
- Spark plug: NGK BR9HS.
- Iridium upgrade: NGK CR8EIX.
- Gap: 0.024 inch - set it before fitting.
- Covers 2001-2002.
Buy the plugs for your KTM 400 SX
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 KTM 400 SX take?
The KTM 400 SX takes an NGK BR9HS spark plug, gapped to 0.024 inch. The iridium upgrade is the CR8EIX.
What is the spark plug gap for a KTM 400 SX?
The spark plug gap for the KTM 400 SX is 0.024 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 KTM 400 SX?
Yes. The CR8EIX is the iridium version of the BR9HS - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your KTM 400 SX
We cover the other consumables for your machine too - the exact fit, cited, in one place.