KTM 1290 Super Duke GT Owner's Manual page 213

Info
The fluid level rises with increasing wear of the clutch facing discs.
Never use DOT 5 brake fluid. It is silicone-based and purple in color. Oil seals and clutch lines are not
designed for DOT 5 brake fluid.
Avoid contact between brake fluid and painted parts. Brake fluid attacks paint.
Only use clean brake fluid from a sealed container.
SERVICE WORK ON THE CHASSIS 13
–
Move the clutch fluid reservoir mounted on the handlebar to a
horizontal position.
211