KTM 660 Rally Spark Plug
The KTM 660 Rally (660cc) takes an NGK DR9EA spark plug, gapped to 0.028".
Key takeaways
- Spark plug: NGK DR9EA.
- Iridium upgrade: NGK DR9EIX.
- Gap: 0.028 inch - set it before fitting.
- Covers 2001-2004 (plug changed across years - see table).
Buy the plugs for your KTM 660 Rally
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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KTM 660 Rally spark plugs by year
| Years | Standard | Iridium | Gap |
|---|---|---|---|
| 2003-2004 | DR9EA | DR9EIX | 0.028" |
| 2001-2002 | DPR8EA-9 | DPR8EIX-9 | 0.035" |
Frequently asked
What spark plug does a KTM 660 Rally take?
The KTM 660 Rally takes an NGK DR9EA spark plug, gapped to 0.028 inch. The iridium upgrade is the DR9EIX. See the by-year table for earlier models.
What is the spark plug gap for a KTM 660 Rally?
The spark plug gap for the KTM 660 Rally is 0.028 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 KTM 660 Rally?
Yes. The DR9EIX is the iridium version of the DR9EA - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your KTM 660 Rally
We cover the other consumables for your machine too - the exact fit, cited, in one place.