KTM 65 SX 2020 Owner's Manual page 102

19 TROUBLESHOOTING
Faults
Engine has too little power
Engine stalls or is popping into
the carburetor
Engine overheats
White smoke emission (steam
in exhaust gas)
Gear oil exits at the vent hose
Water in the gear oil
100
Possible cause
Fault in ignition system
Diaphragm or reed valve hous-
ing damaged
Noticeable wear
Lack of fuel
Engine takes in bad air
The connector or ignition coil is
loose or oxidized
Too little coolant in cooling sys-
tem
Too little air stream
Radiator fins very dirty
Foam formation in cooling sys-
tem
Damaged cylinder head or
cylinder head gasket
Bent radiator hose
Incorrect ignition point due to
loose stator
Damaged cylinder head or
cylinder head gasket
Too much gear oil added
Damaged shaft seal ring or
water pump
Action
–
Check the ignition system.
–
Adjust the ignition.
–
Check the diaphragm and reed valve
housing.
–
Overhaul the engine.
–
Turn the knurled screw on the fuel tap
all the way counterclockwise.
–
Fill up with fuel. ( p. 25)
–
Check the intake flange and carburetor
for tightness.
–
Clean the plug-in connection and treat
it with contact spray.
–
Check the cooling system for leakage.
–
Check the coolant level. (
–
Switch off engine when standing.
–
Clean radiator fins.
–
Drain the coolant. ( p. 85)
–
Refill with coolant. (
–
Check the cylinder head or cylinder
head gasket.
–
Change the radiator hose.
–
Adjust the ignition.
–
Check the cylinder head or cylinder
head gasket.
–
Check the gear oil level. (
–
Check the shaft seal ring and water
pump.
p. 85)
p. 86)
p. 92)