2007-2009 Kawasaki KFX50 service manual, Page 227Get this manual
16STARTING SYSTEM Check for continuity between pairs of the commutator segments and there should be continuityAlso, make continuity check between individual commutator segments and the armature shaftThere should be no continuity
STARTER MOTOR CASE CONTINUITY INSPECTION Check to confirm that there is no continuity between the starter motor wire terminal and the motor front coverAlso check for the continuity between the wire terminal and each brushThe positive brush is continuity and negative brush is no continuityReplace if necessary