Yamaha FZ1-N Service Manual

Contents

ELECTRICAL COMPONENTS8-104c. Measure the primary coil resistance.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲2. Check:• Secondary coil resistanceOut of specification → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Disconnect the ignition coil leads from thewire harness.b. Connect the pocket tester (Ω × 1k) to theignition coil as shown.c. Measure the secondary coil resistance.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲3. Check:• Ignition spark gap “a”Out of specification → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Disconnect the spark plug cap from thespark plug.b. Connect the ignition checker/dynamicspark tester “2” as shown.c. Set the main switch to “ON”.d. Measure the ignition spark gap “a”.e. Crank the engine by pushing the starterswitch and gradually increase the sparkgap until a misfire occurs.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS28120CHECKING THE CRANKSHAFT POSITIONSENSOR1. Disconnect:• Crankshaft position sensor coupler(from the wire harness)2. Check:• Crankshaft position sensor resistanceOut of specification → Replace the crank-shaft position sensor.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼• Positive tester probeIgnition coil terminal• Negative tester probeIgnition coil terminalSecondary coil resistance8.5–11.5 kΩ at 20°C (68°F)Pocket tester90890-03112Analog pocket testerYU-03112-C• Negative tester probeIgnition coil terminal “1”• Positive tester probeSpark plug terminal “2”Minimum ignition spark gap6.0 mm (0.24 in)Ignition checker90890-06754Opama pet-4000 spark checkerYM-344871. Spark plug capCrankshaft position sensorresistance336–504 Ω at 20°C (68°F)