Engine Oil; Cleaning Short/Long Oil Screen; Changing The Engine Oil - KTM 250 SX-F Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE
JASO T903 MA
TEMPERATURE
5W/40
1
38
1
3
4
5°C
41°F
10W/50
250 SX-F
2
450 SX-F
2

Engine oil

Automobile engine oil used to be used for four-stroke motorcycles before there
were separate motorcycle specifications. Different technical developments made
it necessary to have a separate specification for four-stroke motorcycles - the
JASO T903 MA standard. Whereas car engines require long changing intervals,
motorcycle engines require a higher power output at higher speeds. Most
motorcycle engines also use the same oil to lubricate the transmission and
the clutch. The JASO MA standard responds to these special requirements.
Only use fully synthetic engine oils that meet the JASO MA quality requirements
(see information on the can).
KTM recommends Motorex Power Synt 4T in the 10W/50 viscosity (for
temperatures over 5°C, 41°F) or 5W/40 (for temperatures under 5°C, 41°F).
Insufficient oil or poor quality oil results in premature wear of the engine.

Changing the engine oil *

NOTE: When changing the engine oil, it is necessary to clean the short and
long oil screens (450 SX-F only one oil screen) and to replace the oil filter.
Engine oil has be changed with the engine at an operating temperature.
An engine at operating temperature and the engine oil it contains are very hot
– do not burn or scald yourself.
Place the motorcycle on a horizontal surface, remove the plug [1] and allow
the oil to drain into a receptacle.
Clean plug (with magnet) thoroughly.
Once the entire oil has been drained, clean the sealing surface, mount the
plug together with the sealing ring and tighten it to 20 Nm.
CLEANING THE SHORT OIL SCREEN (250 SX-F) AND OIL SCREEN (450 SX-F)
The oil screen is accommodated in the hex-socket plug [3] at the engine bottom.
Insert a pin-type key into the plug and tap on the key a few times with a hammer
in order to relieve the stress acting on the plug. Dismount the oil screen, clean
the components thoroughly and blow compressed air through them. Check
the O-rings for damage and, if necessary, replace them. Mount the oil screen
together with the plug again and tighten the plug to 10 Nm (250 SX-F) or 30
Nm (450 SX-F).
CLEANING THE LONG OIL SCREEN (250 SX-F)
The long oil screen is accommodated in the hexagon plug [3] adjacent to the
engine number. Dismount the plug together with the oil screen, clean the
components thoroughly and blow compressed air through them. Check the O-
rings for damage and, if necessary, replace them.
To mount the long oil screen [4], place it on an approx. 300 mm (12 in) long
pin-type key or a similar tool. Insert the pin-type key through the opening into
the bore of the opposite engine casing wall. Then, push the oil screen into
the engine casing as far as possible. Remove the pin-type key, mount the plug
and tighten it to 15 Nm.
The oil screen is mounted slightly downwards, incorrectly fitted, the screen
looses its function and this can cause increased engine wear.
»