2003-2006 Kawasaki KFX400 service manual, Page 58Get this manual
PERIODIC MAINTENANCE
SPARK PLUG INSTALLATION To 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 Insert the spark plug and finger tighten it to the cylinder head and then tighten it to the specified torqueSpark plug: 11 Nm (1.1 kgf-m, 8.0 lb-ft)