KTM GS500 2-Stroke Spark Plug
The KTM GS500 2-Stroke (400cc) takes an NGK LKAR8A-9 spark plug, gapped to 0.032".
Key takeaways
- Spark plug: NGK LKAR8A-9.
- Iridium upgrade: NGK LKAR8AI-9.
- Gap: 0.032 inch - set it before fitting.
- Covers 2009.
Buy the plugs for your KTM GS500 2-Stroke
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 GS500 2-Stroke take?
The KTM GS500 2-Stroke takes an NGK LKAR8A-9 spark plug, gapped to 0.032 inch. The iridium upgrade is the LKAR8AI-9.
What is the spark plug gap for a KTM GS500 2-Stroke?
The spark plug gap for the KTM GS500 2-Stroke 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 KTM GS500 2-Stroke?
Yes. The LKAR8AI-9 is the iridium version of the LKAR8A-9 - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your KTM GS500 2-Stroke
We cover the other consumables for your machine too - the exact fit, cited, in one place.