KTM 300 EXC Spark Plug
GarageDex's powersports data shows the KTM 300 EXC uses a BR7EIX spark plug, gapped to 0.028". Spark plug fitment varies by year - see the table for each range.
Spark plug fitment by year
| Years | Standard plug | Iridium upgrade | Gap |
|---|---|---|---|
| 2006 | - | BR7EIX | 0.028" |
| 1993-1995 | BR8ECM | BR9EIX | 0.024" |
| 1991-1992 | BR9EIX | - | 0.024" |
250cc 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 300 EXC
The recommended plug is a BR7EIX. Match that code - spark plugs are thread-, reach-, and heat-range-specific, so the part number matters more than the brand. Worth considering: the BR7EIX 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 300 EXC take?
GarageDex's powersports data shows the KTM 300 EXC uses a BR7EIX spark plug, gapped to 0.028". Spark plug fitment varies by year - see the table for each range.
What is the spark plug gap on a KTM 300 EXC?
The KTM 300 EXC spark plug gap is 0.028". 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.
Does the KTM 300 EXC spark plug change by year?
Yes - the fitment differs across the years we cover: 2006 uses BR7EIX; 1993-1995 uses BR8ECM; 1991-1992 uses BR9EIX. 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.