TROUBLESHOOTING 20
101
Faults
Possible cause
Action
Engine turns but does not start
Operating error
–
Carry out 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 supply interrupted
–
Check the fuel tank breather.
–
Clean the fuel tap.
–
Check/set the carburetor components.
Spark plug sooty or wet
–
Clean and dry the spark plug and spark
plug connector, or change 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.
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.
(
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.
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.
Содержание MC 50 2022
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