21 TROUBLESHOOTING
115
Faults
Possible cause
Action
The engine cannot be cranked (elec-
tric starter)
(All 150/250/300 models)
Operating error
–
Carry out the start procedure. (
Battery discharged
–
Recharge the battery.
–
Check the charging voltage.
–
Check the closed current.
Main fuse blown
–
Change the main fuse. (
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. (
Motorcycle was out of use for a long
time and there is old fuel in the float
chamber
–
Empty the carburetor float chamber.
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
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.
Short circuit cable in wiring harness
frayed, kill switch faulty
–
Check the kill switch.
The connector or ignition coil is
loose or oxydized
–
Clean the connector and treat 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.
Spark plug defective
–
Change the spark plug.
Ignition system defective
–
Ignition coil - check the primary winding.
–
Ignition coil - check the secondary winding.
–
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.
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.
Fault in ignition system
–
Check the ignition system.
Diaphragm or reed valve housing
damaged
–
Check the diaphragm and reed valve housing.