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TRBL
SHTG
EAS00844
TROUBLESHOOTING
TIP
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 FAILURE/HARD STARTING
STARTING FAILURE/HARD STARTING
ENGINE
Cylinder and cylinder head
8Loose spark plug
8Loose cylinder head or cylinder
8Damaged cylinder head gasket
8Damaged cylinder gasket
8Worn or damaged cylinder
8Incorrect valve clearance
8Improperly sealed valve
8Incorrect valve-to-valve-seat contact
8Incorrect valve timing
8Faulty valve spring
8Seized valve
Piston and piston ring
8Improperly installed piston ring
8Damaged, worn or fatigued piston ring
8Seized piston ring
8Seized or damaged piston
Air filter
8Improperly installed air filter
8Clogged air filter element
Crankcase and crankshaft
8Improperly assembled crankcase
8Seized crankshaft
FUEL SYSTEM
Fuel tank
8Empty fuel tank
8Clogged fuel tank cap breather hole
8Deteriorated or contaminated fuel
8Clogged or damaged fuel hose
Fuel pump
8Faulty fuel pump
8Improperly routed hose
Throttle body
8Deteriorated or contaminated fuel
8Sucked-in air
ELECTRICAL SYSTEMS
Battery
8Discharged battery
8Faulty battery
Fuse(s)
8Blown, damaged or incorrect fuse
8Improperly installed fuse
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
8Cracked or broken ignition coil body
8Broken or shorted primary or secondary
coil
8Faulty spark plug lead
Ignition system
8Faulty ECU
8Faulty crankshaft position sensor
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
8Faulty sidestand switch
8Improperly grounded circuit
8Loose connections
Starting system
8Faulty starter motor
8Faulty starter relay
8Faulty starting circuit cut-off relay
8Faulty starter clutch
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