KTM 390 Duke Series 2019 Owner's Manual page 154

13 BRAKE SYSTEM
152
Main work
Condition
The screw cap is locked.
–
Remove screw
H01142-10
–
Stand the vehicle upright.
–
Remove screw cap
–
Add brake fluid to level
Brake fluid DOT 4 / DOT 5.1 (
–
Mount screw cap with membrane.
Info
Clean up overflowed or spilled brake fluid immediately
F00852-10
with water.
1
and take off the screw cap lock.
2 3
with membrane .
A
.
p. 238)