♔♔♔ KTM 250 525 SX, MXC, EXC Electrical System and Wiring Diagram The following Electrical System and Wiring Diagram manual apply for KTM 250 and 525 SX, MXC, EXC 2000 through 2003 models. In this manual you will find detail information about the electrical system, troubleshooting procedures and wiring diagram of each models. Starting with Leakage Inspection procedures, you will guided step-by-step through another section which are battery removal, charging and installation procedures, checking capacitor, voltage regulator/rectifier and charging voltage, CDI Unit, Checking the ignition coil, troubleshooting the ignition system, main fuse illustration, checking the electric starter motor and starter relay.