TROUBLESHOOTING 20
101
Faults Possible cause Action
Engine turns but does not start Operating error –
Carry out start procedure. ( p. 20)
Motorcycle was out of use for a
long time and there is old fuel in
the float chamber
– Empty the carburetor float chamber.
Fuel supply 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.
Plug gap of spark plug too wide – Adjust 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 har-
ness frayed, stop button faulty
– Check the stop button.
The connector or ignition coil is
loose or oxidized
– Clean the plug-in connection and treat it
with contact spray.
Water in carburetor or jets
blocked
– Check/set the carburetor components.
Engine has no idle speed Idling jet blocked – Check/set the carburetor components.
Adjusting screws on the carbu-
retor are in turned to the wrong
position
– Carburetor – adjust the idle speed.
( p. 87)
Spark plug defective – Change spark plug.
Ignition system defective – Check the ignition coil.
– Check the spark plug connector.
Engine does not speed up The carburetor is flowing over
because the float needle is 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 supply 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. 51)
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. ( p. 52)
Ignition system defective – Check the ignition coil.
– Check the spark plug connector.
Diaphragm or reed valve housing
damaged
– Check the diaphragm and reed valve hous-
ing.
Noticeable wear – Overhaul the engine.
Clutch engagement speed too low
or too high
–
Check the clutch setting. ( p. 88)
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