KTM 125 SX 2018 Owner's Manual page 93

19 TROUBLESHOOTING
Faults
Engine overheats
White smoke emission (steam in
exhaust gas)
Gear oil exits at the vent hose
Water in the gear oil
Possible cause
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
–
Change the radiator hose.
–
Adjust the ignition.
–
Check the cylinder head and cylinder head gas-
ket.
–
Check the gear oil level. (
–
Check the shaft seal ring and water pump.
91
p. 85)