2004-2009 Suzuki LT-Z250 Service Manual, Page 21Get this manual

PERIODIC MAINTENANCE

SPARK PLUG GAP Measure the spark plug gap using the thickness gaugeIf the spark plug gap is out of specification, adjust the gap Standard Spark plug gap: 0.6 0.7 mm (0.024 0.028 in)
0.6 0.7 mm (0.024 0.028 in)

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