KTM 640 LC4 Super Moto Spark Plug
GarageDex's powersports data shows the KTM 640 LC4 Super Moto uses a DCPR8E spark plug, gapped to 0.032", or upgrade to the DCPR8EIX iridium plug. Spark plug fitment varies by year - see the table for each range.
Spark plug fitment by year
| Years | Standard plug | Iridium upgrade | Gap |
|---|---|---|---|
| 2003-2004 | DCPR8E | DCPR8EIX | 0.032" |
| 2000-2002 | DR8EA | DR8EIX | 0.024" |
640cc motorcycle. Match the exact part code, thread reach, and heat range. The iridium column is the same-fit upgrade for a longer service life.
Spark plugs for your KTM 640 LC4 Super Moto
The recommended plug is a DCPR8E. Match that code - spark plugs are thread-, reach-, and heat-range-specific, so the part number matters more than the brand. Worth considering: the DCPR8EIX iridium upgrade - it fits the same port, fires cleaner, and lasts far longer between changes.
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Frequently asked
What spark plug does a KTM 640 LC4 Super Moto take?
GarageDex's powersports data shows the KTM 640 LC4 Super Moto uses a DCPR8E spark plug, gapped to 0.032", or upgrade to the DCPR8EIX iridium plug. Spark plug fitment varies by year - see the table for each range.
What is the spark plug gap on a KTM 640 LC4 Super Moto?
The KTM 640 LC4 Super Moto spark plug gap is 0.032". Set the gap with a feeler gauge before install - iridium plugs come pre-gapped but always verify, since a wrong gap causes misfires and hard starts.
Are iridium spark plugs worth it on a KTM 640 LC4 Super Moto?
The DCPR8EIX is the iridium upgrade for the standard DCPR8E. It fits the same port and heat range, fires more reliably, and lasts far longer between changes - a worthwhile swap for most riders, though the standard plug is perfectly fine if you change plugs on schedule.
Does the KTM 640 LC4 Super Moto spark plug change by year?
Yes - the fitment differs across the years we cover: 2003-2004 uses DCPR8E; 2000-2002 uses DR8EA. Match your exact year in the table.
How often should I change the spark plugs on a motorcycle?
Standard plugs typically want replacing every 8,000-12,000 miles (or per your service manual); iridium plugs go much longer. Fouled or worn plugs cause hard starts, misfires, and poor fuel economy - a cheap part that punches above its weight.