KTM 690 DUKE EU Owner's Manual page 79

SERVICE WORK ON THE CHASSIS
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Move the clutch fluid reservoir mounted on the handlebar to a horizontal position.
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Check the fluid level.
The fuel level must be between MIN and MAX.
» If the level of the coolant does not meet specifications:
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Remove the screw cap with the membrane.
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Correct the fluid level of the hydraulic clutch.
Hydraulic fluid (15) (
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Mount the screw cap with the membrane.
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