KTM 125 DUKE 2021 Owner's Manual page 193

Main work
–
Remove radiator cap
F00763-11
–
Loosen bleeder screw
Guideline
3 turns
–
Tilt the vehicle slightly to the right.
–
Pour in the coolant until it emerges without bubbles at the
bleeder screw, and then mount and tighten the bleeder screw
immediately.
Coolant (
F00766-10
–
Completely fill the radiator with coolant. Mount the radiator
cap.
–
Rest the vehicle on the side stand.
1
.
2
.
p. 235)
COOLING SYSTEM 16
191