BSA B40SS Spark Plug
The BSA B40SS takes an NGK BR7ES spark plug, gapped to 0.020".
Key takeaways
- Spark plug: NGK BR7ES.
- Iridium upgrade: NGK BR7EIX.
- Gap: 0.020 inch - set it before fitting.
- Covers 1990.
Buy the plugs for your BSA B40SS
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 BSA B40SS take?
The BSA B40SS takes an NGK BR7ES spark plug, gapped to 0.020 inch. The iridium upgrade is the BR7EIX.
What is the spark plug gap for a BSA B40SS?
The spark plug gap for the BSA B40SS is 0.020 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 BSA B40SS?
Yes. The BR7EIX is the iridium version of the BR7ES - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your BSA B40SS
We cover the other consumables for your machine too - the exact fit, cited, in one place.