KTM 990 SUPER DUKE - Manual (Page 63)

Checking the cooling liquid level in the radiator *
Hold the radiator cap [1] with a cloth, carefully turn in a counterclockwise direction and
remove. 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 is probably leaking. Have the cooling
system checked at an authorized KTM workshop.
IF POSSIBLE, CHECK THE COOLING LIQUID LEVEL WHEN THE ENGINE IS COLD. IF YOU NEED TO
REMOVE THE RADIATOR CAP WHEN THE ENGINE IS HOT, HOLD THE CAP WITH A CLOTH AND
OPEN SLOWLY, ALLOWING ANY EXCESS PRESSURE TO ESCAPE (DANGER OF SCALDING).
– ACCUMULATED SOIL AND LIME ON THE RADIATOR CAP WILL CAUSE YOU TO LOSE COOLING
LIQUID. CAREFULLY CLEAN THE RADIATOR CAP, GASKET [2] AND SEALING AREA EACH TIME.
– IF MORE THAN 1 LITER OF COOLING LIQUID NEEDS TO BE ADDED, YOU WILL NEED TO BLEED
THE COOLING SYSTEM.
MAINTENANCE WORK ON CHASSIS AND ENGINE
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62
Bleeding the cooling system *
Take off the left and right spoilers. To take off the spoilers, remove the screws [3] and [4]
on each side.
1
3
3
4
4
2