2003 Kawasaki KLF250 Service Manual., Page 269Get this manual
ELECTRICAL SYSTEM 16-27 Ignition System
Ignition Coil Installation
Connect the primary winding leads to the ignition coil terminals as shownGW Lead (+) Mark [A] BKY Lead (-) Mark
Ignition Coil Inspection
ignition coil Remove the arcing distance with coil tester [A] to check Measure the the condition of the ignition coil [B](with cap left Connect the ignition coil spark the spark plugthe testerattached at the end of the plug lead) to in the manner prescribed by the manufacturer and measure the arcing distanceIgnition Coil Arcing Distance mm (0.28 in,) or more