Yamaha DT125 Spark Plug
The Yamaha DT125 takes an NGK BR8ES spark plug, gapped to 0.024".
Key takeaways
- Spark plug: NGK BR8ES.
- Iridium upgrade: NGK BR9EIX.
- Gap: 0.024 inch - set it before fitting.
- Covers 1985-2006 (plug changed across years - see table).
Buy the plugs for your Yamaha DT125
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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Yamaha DT125 spark plugs by year
| Years | Standard | Iridium | Gap |
|---|---|---|---|
| 2006 | BR8ES | BR9EIX | 0.024" |
| 1985-2001 | BR9ES | BR9EIX | 0.024" |
Frequently asked
What spark plug does a Yamaha DT125 take?
The Yamaha DT125 takes an NGK BR8ES spark plug, gapped to 0.024 inch. The iridium upgrade is the BR9EIX. See the by-year table for earlier models.
What is the spark plug gap for a Yamaha DT125?
The spark plug gap for the Yamaha DT125 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 Yamaha DT125?
Yes. The BR9EIX is the iridium version of the BR8ES - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Yamaha DT125
We cover the other consumables for your machine too - the exact fit, cited, in one place.