Harley-Davidson XL Spark Plug
The Harley-Davidson XL (1000cc) takes an NGK DCPR7E spark plug, gapped to 0.040".
Key takeaways
- Spark plug: NGK DCPR7E.
- Iridium upgrade: NGK DCPR7EIX.
- Gap: 0.040 inch - set it before fitting.
- Covers 1978-2010 (plug changed across years - see table).
Buy the plugs for your Harley-Davidson XL
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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Harley-Davidson XL spark plugs by year
| Years | Standard | Iridium | Gap |
|---|---|---|---|
| 2009-2010 | DCPR7E | DCPR7EIX | 0.040" |
| 1986-2009 | BR8ES | BR8EIX | 0.020" |
| 1978-1981 | B6L | - | 0.040" |
Frequently asked
What spark plug does a Harley-Davidson XL take?
The Harley-Davidson XL takes an NGK DCPR7E spark plug, gapped to 0.040 inch. The iridium upgrade is the DCPR7EIX. See the by-year table for earlier models.
What is the spark plug gap for a Harley-Davidson XL?
The spark plug gap for the Harley-Davidson XL is 0.040 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 Harley-Davidson XL?
Yes. The DCPR7EIX is the iridium version of the DCPR7E - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Harley-Davidson XL
We cover the other consumables for your machine too - the exact fit, cited, in one place.