KTM 125 DUKE 2021 Owner's Manual page 205

Main work
–
Place an appropriate container under the engine.
–
Remove oil drain plug
–
Remove oil screen
–
Allow the engine oil to drain completely.
–
Clean the oil drain plug and the oil screen thoroughly.
–
Position oil screen
1
plug with the O-ring.
S04689-10
Guideline
Oil drain plug
–
Remove screws
ring.
–
Pull oil filter
–
Allow the engine oil to drain completely.
–
Thoroughly clean the parts and the sealing surface.
S04690-10
SERVICE WORK ON THE ENGINE 18
1
with the O-ring.
2
with the O-ring.
2
and mount and tighten oil drain
M24x1.5
3
. Take off oil filter cover
5
out of the oil filter housing.
15 Nm (11.1 lbf ft)
4
with the O-
203