Yamaha XC50V - Incorrect Engine Idling Speed; Engine; Fuel System; Electrical Systems

9-2
TRBL
SHTG
STARTING FAILURES/HARD STARTING/
INCORRECT ENGINE IDLING SPEED
Ignition system
8Faulty C.D.I.unit
8Faulty pickup coil
8Broken AC magneto rotor woodruff key
Switches and wiring
8Faulty main switch
8Faulty engine stop switch
8Broken or shorted wiring
8Faulty front, rear or both brake light
switches
8Faulty start switch
8Improperly grounded circuit
8Loose connections
Starting system
8Faulty starter motor
8Faulty starter relay
8Faulty starter clutch
EAS00847
INCORRECT ENGINE IDLING
SPEED
ENGINE
Cylinder and cylinder head
8Incorrect valve clearance
8Damaged valve train components
Air filter
8Clogged air filter element
FUEL SYSTEM
Carburetor
8Faulty starter plunger
8Loose or clogged slow jet
8Loose or clogged slow air jet
8Damaged or loose carburetor joint
8Improperly synchronized carburetor
8Improperly adjusted engine idling speed
(throttle stop screw)
8Improper throttle cable free play
8Flooded carburetor
Autochoke unit
8Faulty starter plunger
8Faulty C.D.I. unit
ELECTRICAL SYSTEMS
Battery
8Discharged battery
8Faulty battery
Spark plug
8Incorrect spark plug gap
8Incorrect spark plug heat range
8Fouled spark plug
8Worn or damaged electrode
8Worn or damaged insulator
8Faulty spark plug cap
Ignition coil
8Faulty spark plug lead
Ignition system
8Faulty C.D.I. unit
8Faulty pickup coil