Triumph Speed Four Spark Plug
The Triumph Speed Four (600cc) takes an NGK CR9EK spark plug, gapped to 0.024".
Key takeaways
- Spark plug: NGK CR9EK.
- Iridium upgrade: NGK BR8EIX.
- Gap: 0.024 inch - set it before fitting.
- Covers 2002-2003.
Buy the plugs for your Triumph Speed Four
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 Triumph Speed Four take?
The Triumph Speed Four takes an NGK CR9EK spark plug, gapped to 0.024 inch. The iridium upgrade is the BR8EIX.
What is the spark plug gap for a Triumph Speed Four?
The spark plug gap for the Triumph Speed Four 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 Triumph Speed Four?
Yes. The BR8EIX is the iridium version of the CR9EK - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Triumph Speed Four
We cover the other consumables for your machine too - the exact fit, cited, in one place.