2003 Kawasaki KLF250 Service Manual., Page 265Get this manual

ELECTRICAL SYSTEM 16-23 Charging System
RegulatorRectifier Inspection

Remove: Bracket Bolts [A] Regulator
Connector [B] (disconnect) RegulatorRectifier [C]

Rectifier Circuit Check: Check conductivity of the following pair of terminals
Rectifier Circuit Inspection Tester connection W-Y1, BKY-Y1, W-Y2, BKY-Y2, W-Y3 BKY-Y3

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