Trbl Shtg; Electrical Systems; Incorrect Engine Idling Speed; Engine - Yamaha YZF-R1P Service Manual

ELECTRICAL SYSTEMS

Battery
• Discharged battery
• Faulty battery
Fuse(s)
• Blown, damaged or incorrect fuse
• Improperly installed fuse
Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
Ignition coil(s)
• Cracked or broken ignition coil body
• Broken or shorted primary or secondary
coils
• Faulty spark plug lead
EAS00846

INCORRECT ENGINE IDLING SPEED

ENGINE

Cylinder(s) and cylinder head(s)
• Incorrect valve clearance
• Damaged valve train components
Air filter
• Clogged air filter element

FUEL SYSTEM

Throttle body(-ies)
• Damaged or loose throttle body joint
• Improperly synchronized throttle bodies
• Improperly adjusted engine idling speed
(throttle stop screw)
• Improper throttle cable free play
• Flooded throttle body
• Faulty air induction system
STARTING FAILURES/
INCORRECT ENGINE IDLING SPEED
9 - 2
Ignition system
• Faulty ECU
• Faulty crankshaft position sensor
• Broken generator rotor woodruff key
Switches and wiring
• Faulty main switch
• Faulty engine stop switch
• Broken or shorted wiring
• Faulty neutral switch
• Faulty start switch
• Faulty sidestand switch
• Faulty clutch switch
• Improperly grounded circuit
• Loose connections
Starting system
• Faulty starter motor
• Faulty starter relay
• Faulty starting circuit cut-off relay
• Faulty starter clutch
ELECTRICAL SYSTEMS
Battery
• Discharged battery
• Faulty battery
Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
Ignition coil(s)
• Broken or shorted primary or secondary
coils
• Cracked or broken ignition coil
Ignition system
• Faulty ECU
• Faulty crankshaft position sensor
• Broken generator rotor woodruff key
TRBL
SHTG
1
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9