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

2004-2009 Suzuki LT-Z250 Service Manual, Page 21

PERIODIC MAINTENANCE SPARK PLUG GAP Measure the spark plug gap using the thickness gaugeIf the spark plug gap is out of specification,
Check the thread size and reach of the spark plugIf the reach is too short, carbon will be deposited on the screw portion
of the spark plug hole and engine damage may resultSPARK PLUG INSTALLATIONTo avoid damaging the cylinder head threads; first,
finger tighten the spark plug, and then tighten it to the specified torque using the spark plug wrench# Spark plug: 18 Nm