EA~1
TROUBLESHOOTING
,
.......
GENERAL
INFORMATION
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
trouble-
shooting.
Refer to
the relative procedure
in this
manual
for
checks,
adjustments,
and
replace-
ment of parts.
EAS3Q.l.
1
0
STARTING FAILURES
Engine
1. Cylinder(s) and cylinder head(s)
•
Loose
spark
plug
•
Loose cylinder head or cylinder
•
Damaged
cylinder
head
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
2. Piston(s) and piston
ring(s)
•
Improperly installed
piston
ring
•
Damaged,
worn or
fatigued
piston
ring
•
Seized piston
ring
•
Seized
or damaged
piston
3.
Air
filter
•
Improperly installed air filter
•
Clogged
air
filter
element
4. Crankcase and crankshaft
•
Improperly assembled
crankcase
•
Seized
crankshaft
Fuel
system
1.
Fuel
tank
•
Empty
fuel tank
•
Clogged fuel tank cap breather hole
•
Deteriorated or contaminated
fuel
•
Clogged or damaged
fuel hose
2.
Fuel
pump
•
Faulty
fuel
pump
•
Faulty fuel
pump relay
3.
Throttle body (-ies)
•
Deteriorated or contaminated
fuel
•
Sucked-in
air
Electrical
system
1.
Battery
•
Discharged
battery
•
Faulty battery
9-1
TROUBLESHOOTING
2. Fuse(s)
•
Blown,
damaged or
incorrect fuse
•
Improperly
installed
fuse
3.
Spark plug(s)
•
Incorrect
spark plug gap
•
Incorrect
spark plug
heat
range
•
Fouled
spark
plug
•
Worn or damaged
electrode
•
Worn or damaged insulator
4.
Ignition
coil(s)
•
Cracked
or broken
ignition
coil
body
•
Broken or
shorted
primary
or secondary coils
5.
Ignition system
•
Faulty
ECU
•
Faulty crankshaft
position
sensor
•
Broken
generator rotor woodruff
key
6.
Switches
and wiring
•
Faulty
main
switch
•
Faulty
start/engine
stop switch
•
Broken
or shorted
wiring
•
Faulty gear position sensor
•
Faulty sidestand switch
•
Faulty
clutch
switch
•
Improperly grounded
circuit
•
Loose connections
7. Starting
system
•
Faulty
starter motor
•
Faulty
starter
relay
•
Faulty starting circuit cut-off relay
•
Faulty
starter clutch
....,..,.
INCORRECT ENGINE IDLING
SPEED
Engine
1.
Cylinder(s) and cylinder head(s)
•
Incorrect valve
clearance
•
Damaged
valve
train components
2
.
Air filter
•
Clogged
air filter
element
Fuel
system
1. Throttle
body
(-ies)
•
Damaged or loose
throttle
body joint
•
Improperly synchronized
throttle
bodies
•
Improper
throttle
grip
tree
play
•
Flooded
throttle
body
•
Faulty air induction system
Electrical
system
1.
Battery
•
Discharged
battery
•
Faulty
battery
2.
Spark plug(s)
•
Incorrect
spark plug gap
•
Incorrect
spark plug
heat
range
•
Fouled
spark
plug