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21 TROUBLESHOOTING
Faults
The engine cannot be cranked
(electric starter)
(150 XC‑W US)
Engine turns but does not start
Engine has no idle
Engine does not speed up
136
Possible cause
Operating error
Battery discharged
Main fuse is blown
Starter relay faulty
Starter motor faulty
Operating error
Motorcycle was out of use for a
long time and there is old fuel
in the float chamber
Fuel feed interrupted
Spark plug oily or wet
Electrode distance (plug gap)
of spark plug too wide
Fault in ignition system
Kill switch cable in wiring har-
ness frayed, kill switch defec-
tive
The connector or ignition coil is
loose or oxidized
Water in carburetor or jets
blocked
Idling jet blocked
Adjusting screws on carburetor
distorted
Spark plug defective
Ignition system defective
Carburetor running over
because float needle dirty or
worn
Loose carburetor jets
Fault in ignition system
Action
–
Carry out the start procedure.
(
p. 42)
–
Recharge the battery.
(
–
Check the charging voltage.
–
Check the closed current.
–
Check the alternator.
–
Change the main fuse. (
–
Check the starter relay.
–
Check the starter motor.
–
Carry out the start procedure.
(
p. 42)
–
Empty the carburetor float chamber.
(
p. 127)
–
Check the fuel tank breather.
–
Clean the fuel tap.
–
Check/set the carburetor components.
–
Clean and dry the spark plug, or
change it if necessary.
–
Adjust the plug gap.
Guideline
Spark plug electrode gap (125 XC‑W
EU)
0.60 mm (0.0236 in)
Spark plug electrode gap (150 XC‑W
US)
0.60 mm (0.0236 in)
–
Check the ignition system.
–
Check the kill switch.
–
Clean the connector and treat it with
contact spray.
–
Check/set the carburetor components.
–
Check/set the carburetor components.
–
Carburetor – adjust the idle speed.
(
p. 122)
–
Change the spark plug.
–
Check the ignition coil.
–
Check the spark plug connector.
–
Check/set the carburetor components.
–
Check/set the carburetor components.
–
Check the ignition system.
p. 105)
p. 107)
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