KTM 50 SX 2020 Owner's Manual page 124

20 TROUBLESHOOTING
Faults
Engine overheats
White smoke emission (steam
in exhaust gas)
Gear oil exits at the vent hose
Water in the gear oil
122
Possible cause
Bent radiator hose
Damaged cylinder head or
cylinder head gasket
Too much gear oil added
Damaged shaft seal ring or
water pump
Action
–
Change the radiator hose.
–
Check the cylinder head or cylinder
head gasket.
–
Check the gear oil level. (
–
Check the shaft seal ring and water
pump.
p. 106)