2008-2010 Kawasaki KFX450R Factory Service Manual, Page 443Get this manual
ELECTRICAL SYSTEM 16-43 Electric Starter System
Armature Inspection
the hand measure the Using between any two tester range,segments [A]resistance commutator
Special ToolHand Tester: 57001-1394
If there is high resistance or no reading) between any two segments, winding is open and the starter motor must be replacedUsing the highest hand tester range, measure the resistance between the segments and the shaft [B]If there is any reading at all, the armature has short and the starter motor must be replaced
Even if the foregoing checks show the armature to be good, it may be defective in some manner not readily detectable with the hand testerIf all other starter motor and starter motor circuit components check good, but the starter motor still does not turn over or only turns over weakly, replace the starter motor with new one