KTM 890 Duke R - Owner's Manual > Cooling system

Water pump 1 in the engine ensures forced circulation of the coolant.

The pressure resulting from the warming of the cooling system is regulated by a valve in radiator cap 2. Heat expansion causes excess coolant to flow into compensating tank 3. When the temperature falls, this surplus coolant is sucked back into the cooling system. This ensures that operating the vehicle at the specified coolant temperature will not result in a risk of malfunctions.

115 ºC (239 ºF)

The coolant is cooled by the air stream and a radiator fan 4, which is activated at high temperature.

The lower the speed, the less the cooling effect. Dirty cooling fins also reduce the cooling effect.

Checking the antifreeze and coolant level

Warning

Danger of scalding During motorcycle operation, the coolant gets very hot and is under pressure.

• Do not open the radiator, the radiator hoses or other cooling system components if the engine or the cooling system are at operating temperature.
• Allow the cooling system and the engine to cool down before you open the radiator, the radiator hoses or other components of the cooling system.
• In the event of scalding, rinse the area affected immediately with lukewarm water.

Danger of poisoning Coolant is toxic and a health hazard.

• Keep coolant out of the reach of children.
• Do not allow coolant to come into contact with the skin, the eyes and clothing.
• Consult a doctor immediately if coolant is swallowed.
• Rinse the affected area immediately with plenty of water in the event of contact with the skin.
• Rinse eyes thoroughly with water and consult a doctor immediately if coolant gets into the eyes.
• Change clothing if coolant spills onto your clothing.

Condition

The engine is cold.

Preparatory work

• Stand the motorcycle upright on a horizontal surface.

Main work

• Remove radiator cap 1 and cap 2 of the compensating tank.
• Check the antifreeze in the coolant.

If the antifreeze in the coolant does not match the specified value:

• Correct the antifreeze in the coolant.

• Check the coolant level in the compensating tank.

The coolant level must be between MIN and MAX.

If the coolant level in the compensating tank is not at the required level, but the tank is not empty:

• Replenish coolant up to a level between MIN and MAX.

Coolant

If there is no coolant in the compensating tank:

• Check the cooling system for leaks.

Info

Do not start up the motorcycle!

• Fill/bleed the cooling system.

• Mount cap 2 of the compensating tank.
• Check the coolant level in the radiator.

The radiator must be filled completely.

If the coolant level does not match the specified value:

• Check the coolant level and the reason for the loss.

If you had to add more coolant than the specified amount: > 0.50 l (> 0.53 qt.)

• Fill/bleed the cooling system.

• Mount radiator cap 1.

• Checking the coolant level in the compensating tank
• Changing the coolant

See also: