Yamaha HS1B Spark Plug
The Yamaha HS1B takes an NGK BR9ES spark plug, gapped to 0.024".
Key takeaways
- Spark plug: NGK BR9ES.
- Iridium upgrade: NGK BR7HIX.
- Gap: 0.024 inch - set it before fitting.
- Covers 1975.
Buy the plugs for your Yamaha HS1B
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 Yamaha HS1B take?
The Yamaha HS1B takes an NGK BR9ES spark plug, gapped to 0.024 inch. The iridium upgrade is the BR7HIX.
What is the spark plug gap for a Yamaha HS1B?
The spark plug gap for the Yamaha HS1B 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 HS1B?
Yes. The BR7HIX is the iridium version of the BR9ES - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Yamaha HS1B
We cover the other consumables for your machine too - the exact fit, cited, in one place.