KTM 790 DUKE 2018 Owner's Manual page 231

Main work
–
Rest the motorcycle on its side stand on a horizontal surface.
–
Place a suitable container under the engine.
–
Remove oil filler plug
cover.
H01066-10
–
Remove oil drain plugs
screens.
V01235-10
SERVICE WORK ON THE ENGINE 19
1
with the O-ring from the clutch
2
with the magnets, O-rings, and oil
229