18. IGNITION SYSTEM K-XCT 125i IGNITION COIL INSPECTION IGNITION COIL PRIMARY PEAK VOLTAGE Remove the body cover (refer to the "FRAME COVERS REMOVAL/INSTALLATION" section in the chapter 2). Check cylinder compression and check that the spark plug (1) is installed correctly in the cylinder. Disconnect the spark plug cap (2) from the (1) (2) spark plug. Turn the ignition switch to "ON" and engine stop switch ON and side stand is up. Connect the multimeter (+) probe to the black wire and the multimeter (-) to the body ground. Check for initial voltage at this time. The battery voltage should be measured. If the initial voltage cannot be measured, check the power output circuit. : 18-4