KTM 640 LC4 Adv. Rally Spark Plug
The KTM 640 LC4 Adv. Rally (640cc) takes an NGK DCPR8E spark plug, gapped to 0.032".
Key takeaways
- Spark plug: NGK DCPR8E.
- Iridium upgrade: NGK DCPR8EIX.
- Gap: 0.032 inch - set it before fitting.
- Covers 1999-2006 (plug changed across years - see table).
Buy the plugs for your KTM 640 LC4 Adv. 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 640 LC4 Adv. Rally spark plugs by year
| Years | Standard | Iridium | Gap |
|---|---|---|---|
| 2003-2006 | DCPR8E | DCPR8EIX | 0.032" |
| 1999-2002 | DR8EA | DR8EIX | 0.024" |
Frequently asked
What spark plug does a KTM 640 LC4 Adv. Rally take?
The KTM 640 LC4 Adv. Rally takes an NGK DCPR8E spark plug, gapped to 0.032 inch. The iridium upgrade is the DCPR8EIX. See the by-year table for earlier models.
What is the spark plug gap for a KTM 640 LC4 Adv. Rally?
The spark plug gap for the KTM 640 LC4 Adv. Rally is 0.032 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 640 LC4 Adv. Rally?
Yes. The DCPR8EIX is the iridium version of the DCPR8E - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your KTM 640 LC4 Adv. Rally
We cover the other consumables for your machine too - the exact fit, cited, in one place.