21 TROUBLESHOOTING 92
Faults Possible cause Action
The engine cannot be cranked (elec-
tric starter)
Operating error – Carry out the start procedure. ( p. 24)
Battery is discharged –
Check the charging voltage. x
–
Check the open-circuit current. x
–
Check the alternator. x
–
Recharge the battery. x ( p. 72)
Main fuse blown – Change the main fuse. ( p. 73)
Starter relay defective –
Check the starter relay. x
Starter motor defective –
Check the starter motor. x
Engine turns but does not start Operating error – Carry out the start procedure. ( p. 24)
The motorcycle has been in disuse for
an extended period and old fuel is in
the float chamber
–
Empty the carburetor float chamber. x
( p. 84)
Fuel supply interrupted – Check the fuel tank breather.
– Clean the fuel tap.
– Check/adjust 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
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 defective
– Check the wiring harness. (visual check)
– Check the electrical system.
Water in carburetor or jets blocked – Check/adjust the carburetor components.
Engine has no idle Idling jet blocked – Check/adjust the carburetor components.
Adjusting screws on the carburetor
are in turned to the wrong position
–
Carburetor - adjust the idle speed. x
( p. 83)
Faulty spark plug – Change the spark plug.
Faulty ignition system –
Check the ignition system. x
Engine does not speed up The carburetor is flowing over
because the float needle is dirty or
worn
– Check/adjust the carburetor components.
Loose carburetor jets – Check/adjust the carburetor components.
Fault in ignition system – Check the ignition system.
Engine has too little power Fuel supply interrupted – Check the fuel tank breather.
– Clean the fuel tap.
– Check/adjust the carburetor components.
Air filter is very dirty –
Clean the air filter and air filter housing. x
( p. 47)
Exhaust system leaky, deformed or
too little glass fiber yarn filling in
main silencer
– Check exhaust system for damage.
– Change the glass fiber yarn filling of the main
silencer. x ( p. 48)
Fault in ignition system – Check the ignition system.
Damaged membrane or membrane
housing
– Check the membrane and membrane housing.
The engine stutters or there is back-
firing through the carburetor
Lack of fuel – Turn handle 1 of the fuel tap to the ON posi-
tion. (Figure B01660-10 p. 15)
– Refuel. ( p. 27)
The engine takes in false air – Check the intake flange and carburetor for firm
seating.
Connector or ignition coil loose or
oxidized
– Clean the connector and treat with contact
spray.
Engine overheats Too little coolant in cooling system – Check the cooling system for leaks.
– Check the coolant level. ( p. 80)
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