Honda CT125 Spark Plug
The Honda CT125 takes an NGK BR9EG spark plug, gapped to 0.024".
Key takeaways
- Spark plug: NGK BR9EG.
- Iridium upgrade: NGK BR8EIX.
- Gap: 0.024 inch - set it before fitting.
- Covers 1982-1997.
Buy the plugs for your Honda CT125
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 Honda CT125 take?
The Honda CT125 takes an NGK BR9EG spark plug, gapped to 0.024 inch. The iridium upgrade is the BR8EIX.
What is the spark plug gap for a Honda CT125?
The spark plug gap for the Honda CT125 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 Honda CT125?
Yes. The BR8EIX is the iridium version of the BR9EG - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Honda CT125
We cover the other consumables for your machine too - the exact fit, cited, in one place.