21
Y
N
Y
N
Y
N
N
Y
Y
N
Diagnosis on engine overheating
Engine overheating
Check whether operation is correct
1.
Check whether gasoline grade is
improper or gasoline is stored for
a long time
2.
Check whether the engine works
at high speed for a long time or
with overload during driving
Check cooling system
Air-cooled engine
Check whether heat sink is spotted or there
is too much oil stain
Clean
Check whether cooling fan or air
director is damaged (forcedly air-
cooled engine)
Inspection & solution
Check whether ignition is
timely conducted with an
ignition timing lamp
1.
Check whether
CDI ignition
device is in good
condition
2.
Check whether
flywheels and
trigger coil are
loosened
Check whether clutch is slipping
Slipping clutch
Solution to
slipping clutch
