KTM 450 XC Owner's Manual page 167

MAINTENANCE ON CHASSIS AND ENGINE
–
Remove the plug screw
–
Completely drain the engine oil.
600136-10
–
Check parts for damage and wear. Replace damaged or worn parts.
–
Thoroughly clean parts and sealing area.
–
Oil the O-rings
them until the O-ring is seated in the housing
–
Fit the plug screw
Guideline
Locking screw, oil sieve, long
600144-10
and large oil screen with both O-rings.

, mount them on the oil screen

with seal ring and tighten it.

and using a long hexagon key insert

with the oil screen.

M20x1.5 15 Nm
(11.1 lbf ft)
165