KTM 990 - Manual (Page 73)

Checking the cooling liquid level in the radiator
Remove the 5 screws and the right cover [1], disconnect the flasher cable and tank
ventilation.
If possible, always check level of cooling liquid when engine is cold. If you have to open the
radiator cap when engine is hot, use a rag to cover the cap and open slowly to release pres-
sure.
Carefully remove the radiator cap [2] with a rag, turning in a counterclockwise direction.
The radiator should be completely filled with cooling liquid. No air should be in the
radiator.
If any cooling liquid is missing, the cooling system may leak. Have the cooling system checked
by an authorized KTM workshop.
If more than 1 liter (0.26 USgal) of cooling liquid needs to be added, the cooling system
must be bled.
MAINTENANCE WORK ON CHASSIS AND ENGINE
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