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21 TROUBLESHOOTING 119
Faults Possible cause Action
The engine cannot be cranked (elec-
tric starter)
(All 250/300 models, XCW US,
XCW Six Days US)
Operating error Carry out the start procedure. ( p. 35)
Battery discharged Recharge the battery. ( p. 91)
Check the charging voltage.
Check the closed current.
Check the alternator.
Main fuse is blown Change the main fuse. ( p. 93)
Starter relay faulty Check the starter relay.
Starter motor faulty Check the starter motor.
Engine turns but does not start Operating error Carry out the start procedure. ( p. 35)
Motorcycle was out of use for a long
time and there is old fuel in the float
chamber
Empty the carburetor float chamber.
( p. 111)
Fuel feed interrupted Check the fuel tank breather.
Clean the fuel tap.
Check/set the carburetor components.
Spark plug oily or wet Clean and dry the spark plug, or change it if
necessary.
Electrode distance (plug gap) of spark
plug too wide
Adjust the plug gap.
Guideline
(All 125/150 models)
Spark plug electrode gap (125 XCW EU)
0.60 mm (0.0236 in)
Spark plug electrode gap (150 XCW US)
0.60 mm (0.0236 in)
(All 250/300 models)
Spark plug electrode gap
0.60 mm (0.0236 in)
Fault in ignition system Check the ignition system.
Kill switch cable in wiring harness
frayed, kill switch defective
Check the kill switch.
The connector or ignition coil is loose
or oxidized
Clean the connector and treat it with contact
spray.
Water in carburetor or jets blocked Check/set the carburetor components.
Engine has no idle Idling jet blocked Check/set the carburetor components.
Adjusting screws on carburetor dis-
torted
Carburetor adjust the idle speed.
( p. 106)
Spark plug defective Change the spark plug.
Ignition system defective Check the ignition coil.
Check the spark plug connector.
Engine does not speed up Carburetor running over because float
needle dirty or worn
Check/set the carburetor components.
Loose carburetor jets Check/set the carburetor components.
Fault in ignition system Check the ignition system.
Engine has too little power Fuel feed interrupted Check the fuel tank breather.
Clean the fuel tap.
Check/set the carburetor components.
Air filter very dirty Clean the air filter and air filter box.
( p. 63)
Exhaust system leaky, deformed or
too little glass fiber yarn filling in
main silencer
Check exhaust system for damage.
Change glass fiber yarn filling in the main
silencer. ( p. 65)
Fault in ignition system Check the ignition system.
Diaphragm or reed valve housing
damaged
Check the diaphragm and reed valve housing.
121


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