Honda MT125R Spark Plug
The Honda MT125R takes an NGK BR9EG spark plug, gapped to 0.024".
Key takeaways
- Spark plug: NGK BR9EG.
- Iridium upgrade: NGK BR9EIX.
- Gap: 0.024 inch - set it before fitting.
- Covers 1999-2007.
Buy the plugs for your Honda MT125R
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 MT125R take?
The Honda MT125R takes an NGK BR9EG spark plug, gapped to 0.024 inch. The iridium upgrade is the BR9EIX.
What is the spark plug gap for a Honda MT125R?
The spark plug gap for the Honda MT125R 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 MT125R?
Yes. The BR9EIX 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 MT125R
We cover the other consumables for your machine too - the exact fit, cited, in one place.