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TRBL
SHTG
EAS00845
TROUBLESHOOTING
NOTE:
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 man-
ual for checks, adjustments, and replacement of parts.
STARTING FAILURE/HARD STARTING
ENGINE
Cylinder(s) and cylinder head
• Loose spark plug
• Loose cylinder head or cylinder
• Damaged cylinder head gasket
• Damaged cylinder gasket
• Worn or damaged cylinder
• Incorrect valve clearance
• Improperly sealed valve
• Incorrect valve-to-valve-seat contact
• Incorrect valve timing
• Faulty valve spring
• Seized valve
Piston(s) and piston ring(s)
• Improperly installed piston ring
• Damaged, worn or fatigued piston ring
• Seized piston ring
• Seized or damaged piston
Air filter
• Improperly installed air filter
• Clogged air filter element
Crankcase and crankshaft
• Improperly assembled crankcase
• Seized crankshaft
FUEL SYSTEM
Fuel tank
• Empty fuel tank
• Clogged fuel tank cap breather hole
• Deteriorated or contaminated fuel
• Clogged or damaged fuel hose
Fuel pump
• Faulty fuel pump
• Faulty fuel pump relay
Throttle body
• Deteriorated or contaminated fuel
• Sucked-in air
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
• Faulty spark plug cap
Ignition coil
• Cracked or broken ignition coil body
• Broken or shorted primary or secondary
coils
• Faulty spark plug lead
Ignition system
• Faulty ECU (engine)
• Faulty crankshaft position sensor
Switches and wiring
• Faulty main switch
• Faulty engine stop switch
• Broken or shorted wiring
• Faulty front, rear or both brake light
switches
• Faulty start switch
• Faulty sidestand switch
• Improperly grounded circuit
• Loose connections
Starting system
• Faulty starter motor
• Faulty starter relay
• Faulty starting circuit cut-off relay
• Faulty starter clutch
STARTING FAILURE/HARD STARTING
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