Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

ELECTRICAL COMPONENTS8-1372. Check:• Secondary coil resistanceOut of specification → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Connect the pocket tester (Ω × 1 k) to theignition coil as shown.b. Measure the secondary coil resistance.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲3. Check:• Ignition spark gapOut of specification → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Connect the ignition checker “1” as shown.b. Turn the main switch to “ON” and enginestop switch to “ ”.c. Measure the ignition spark gap “a”.d. Crank the engine by pushing the startswitch “ ” and gradually increase thespark gap 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.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Connect the pocket tester (Ω × 100) to thecrankshaft position sensor coupler asshown.Secondary coil resistance8.50–11.50 kΩPocket tester90890-03112Analog pocket testerYU-03112-C• Negative tester probeRed/Black “1”• Positive tester probeSpark plug terminal “2”Minimum ignition spark gap6.0 mm (0.24 in)Ignition checker90890-06754Opama pet-4000 spark checkerYM-344872. Ignition coilCrankshaft position sensorresistance248–372 Ω at 20 °C (68 °F)Pocket tester90890-03112Analog pocket testerYU-03112-C• Positive tester probeGray “1”• Negative tester probeBlack “2”