GAS GAS TXT Racing 125 2020 Owner's Manual page 101

Faults
Engine overheats
White smoke development (steam
in the exhaust gas)
Gear oil emerges from the vent
hose
Water in the gear oil
Possible cause
Too little coolant in cooling system –
Too little air stream
Radiator fins very dirty
Foam formation in the cooling
system
Damaged cylinder head or cylin-
der head gasket
Bent radiator hose
Damaged cylinder head or cylin-
der head gasket
Too much gear oil added
Damaged radial shaft seal ring or
water pump
TROUBLESHOOTING 20
Action
Check the cooling system for tightness.
–
Check the antifreeze and coolant level.
( p. 82)
–
Switch off the engine when standing.
–
Clean the radiator fins.
–
Drain the coolant. ( p. 83)
–
Refill with coolant. ( p. 84)
–
Check the cylinder head and cylinder head
gasket.
–
Change the radiator hose.
–
Check the cylinder head and cylinder head
gasket.
–
Check the gear oil level. (
–
Check the radial shaft seal ring and the
water pump.
p. 92)
99