Yamaha XT660X(S) Automobile User Manual


 
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TRBL
SHTG
EAS00844
TROUBLESHOOTING
NOTE:
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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 FAILURES
ENGINE
Cylinder 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 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 drain hose
Deteriorated or contaminated fuel
Fuel pump
Faulty fuel pump
Faulty relay unit
Throttle body
Deteriorated or contaminated fuel
Sucked-in air
STARTING FAILURES