8-1
TRBL
SHTG
STARTING PROBLEMS
NOTE:
EAS00844
TROUBLESHOOTING
The following guide for troubleshooting does not cover all the possible causes of trouble. It should be
helpful, however, as a guide to basic troubleshooting. Refer to the relative procedure in this manual for
checks, adjustments, and replacement of parts.
STARTING PROBLEMS
ENGINE
Cylinders and cylinder head(-s)
Loose spark plug
Loose cylinder head
Damaged cylinder head gasket
Worn or damaged cylinder
Incorrect valve clearance
Incorrectly sealed valve
Incorrect valve-to-valve-seat contact
Incorrect valve timing
Faulty valve spring
Seized valve
Pistons and piston rings
Incorrectly installed piston ring
Damaged, worn or fatigued piston ring
Seized piston ring
Seized or damaged piston
Air filter
Incorrectly installed air filter
Clogged air filter element
Crankcase and crankshaft
Incorrectly assembled crankcase
Seized crankshaft
FUEL SYSTEM
Fuel tank
Empty fuel tank
Clogged fuel filter
Clogged fuel tank breather hose
Deteriorated or contaminated fuel
Fuel cock
Clogged or damaged fuel hose/vacuum hose
Carburetors
Deteriorated or contaminated fuel
Clogged pilot jet
Clogged pilot air passage
Sucked-in air
Damaged float
Worn needle valve
Incorrectly installed needle valve seat
Incorrect fuel level
Incorrectly installed pilot jet
Clogged starter jet
Faulty starter plunger
Incorrectly adjusted starter cable
ELECTRICAL SYSTEMS
Battery
Faulty battery
Discharged battery
Fuses
Blown, damaged or incorrect fuse
Incorrectly installed fuse
Spark plugs
Incorrect spark plug gap
Incorrect spark plug heat range
Fouled spark plug
Worn or damaged electrode
Worn or damaged insulator
Faulty spark plug cap
Ignition coils
Damaged ignition coil
Broken or shorted primary or secondary coils
Faulty spark plug lead
Ignition system
Faulty ignitor unit
Faulty pickup coil
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
Incorrectly grounded circuit
Loose connections
Starting system
Faulty starter motor
Faulty starter relay
Faulty starting circuit cutoff relay
Faulty starter clutch