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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)
SLoose spark plug
SLoose cylinder head
SDamaged cylinder head gasket
SWorn or damaged cylinder
SIncorrect valve clearance
SIncorrectly sealed valve
SIncorrect valve-to-valve-seat contact
SIncorrect valve timing
SFaulty valve spring
SSeized valve
Pistons and piston rings
SIncorrectly installed piston ring
SDamaged, worn or fatigued piston ring
SSeized piston ring
SSeized or damaged piston
Air filter
SIncorrectly installed air filter
SClogged air filter element
Crankcase and crankshaft
SIncorrectly assembled crankcase
SSeized crankshaft
FUEL SYSTEM
Fuel tank
SEmpty fuel tank
SClogged fuel filter
SClogged fuel tank breather hose
SDeteriorated or contaminated fuel
Fuel cock
SClogged or damaged fuel hose/vacuum hose
Carburetors
SDeteriorated or contaminated fuel
SClogged pilot jet
SClogged pilot air passage
SSucked-in air
SDamaged float
SWorn needle valve
SIncorrectly installed needle valve seat
SIncorrect fuel level
SIncorrectly installed pilot jet
SClogged starter jet
SFaulty starter plunger
SIncorrectly adjusted starter cable
ELECTRICAL SYSTEMS
Battery
SFaulty battery
SDischarged battery
Fuses
SBlown, damaged or incorrect fuse
SIncorrectly installed fuse
Spark plugs
SIncorrect spark plug gap
SIncorrect spark plug heat range
SFouled spark plug
SWorn or damaged electrode
SWorn or damaged insulator
SFaulty spark plug cap
Ignition coils
SDamaged ignition coil
SBroken or shorted primary or secondary coils
SFaulty spark plug lead
Ignition system
SFaulty ignitor unit
SFaulty pickup coil
Switches and wiring
SFaulty main switch
SFaulty engine stop switch
SBroken or shorted wiring
SFaulty neutral switch
SFaulty start switch
SFaulty sidestand switch
SFaulty clutch switch
SIncorrectly grounded circuit
SLoose connections
Starting system
SFaulty starter motor
SFaulty starter relay
SFaulty starting circuit cutoff relay
SFaulty starter clutch