KTM EXC Spark Plug
GarageDex's powersports data shows the KTM EXC uses a BR7ES spark plug, gapped to 0.024", or upgrade to the BR8ECMIX 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 |
|---|---|---|---|
| 1998-2005 | BR7ES | BR8ECMIX | 0.024" |
| 1996 | BR8ECM | BR8EIX | 0.024" |
| 1990 | - | BR9EIX | 0.024" |
| 1984 | BR9ES | BR9EIX | 0.024" |
| 1980 | BR8ECM | BR8HIX | 0.024" |
| 1980 | LKAR8A-9 | BR9EIX | 0.024" |
| 1977 | BR9HS | BR9HIX | 0.024" |
300cc 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 EXC
The recommended plug is a BR7ES. Match that code - spark plugs are thread-, reach-, and heat-range-specific, so the part number matters more than the brand. Worth considering: the BR8ECMIX 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 EXC take?
GarageDex's powersports data shows the KTM EXC uses a BR7ES spark plug, gapped to 0.024", or upgrade to the BR8ECMIX iridium plug. Spark plug fitment varies by year - see the table for each range.
What is the spark plug gap on a KTM EXC?
The KTM EXC spark plug gap is 0.024". 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 EXC?
The BR8ECMIX is the iridium upgrade for the standard BR7ES. 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 EXC spark plug change by year?
Yes - the fitment differs across the years we cover: 1998-2005 uses BR7ES; 1996 uses BR8ECM; 1990 uses BR9EIX; 1984 uses BR9ES; 1980 uses BR8ECM; 1980 uses LKAR8A-9; 1977 uses BR9HS. 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.