Honda TRX350 Fourtrax Spark Plug
The Honda TRX350 Fourtrax (350cc) takes an NGK DPR7EA-9 spark plug, gapped to 0.036".
Key takeaways
- Spark plug: NGK DPR7EA-9.
- Iridium upgrade: NGK BR8EIX.
- Gap: 0.036 inch - set it before fitting.
- Covers 2000-2006.
Buy the plugs for your Honda TRX350 Fourtrax
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 TRX350 Fourtrax take?
The Honda TRX350 Fourtrax takes an NGK DPR7EA-9 spark plug, gapped to 0.036 inch. The iridium upgrade is the BR8EIX.
What is the spark plug gap for a Honda TRX350 Fourtrax?
The spark plug gap for the Honda TRX350 Fourtrax is 0.036 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 TRX350 Fourtrax?
Yes. The BR8EIX is the iridium version of the DPR7EA-9 - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Honda TRX350 Fourtrax
We cover the other consumables for your machine too - the exact fit, cited, in one place.