KTM 390 Duke Series 2019 Owner's Manual page 193

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Stand the motorcycle upright on a horizontal surface.
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Check the coolant level in compensating tank
The coolant level must be between the two markings.
» If the coolant level does not match the specified value:
–
Correct the coolant level.
Coolant (
F00855-10
–
Remove radiator cap
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:
> 0.20 l (> 0.21 qt.)
–
Fill/bleed the cooling system.
F00856-11
–
Mount the radiator cap.
COOLING SYSTEM 16
1
.
p. 238)
2
and check the coolant level in the
( p. 193)
191