Changing the cooling liquid
– Remove the radiator cap 1 when the engine is cold.
– Remove the drain plug
2 on the water pump cover and allow the
cooling liquid to drain into a suitable pan.
– Remount the drain plug
2 and tighten to 10 Nm.
– Fill the cooling system with cooling liquid in a ratio of 50%
antifreeze and 50% distilled water (freeze protection down to at
least -25°C) to 10 mm over the radiator fins
.
– Mount the radiator cap 1.
– Go for a short ride and check the cooling liquid level again.
Checking the cooling liquid level
– When the engine is cold, the cooling liquid should be approx. 10
mm over the radiator fins (see illustration).
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).
Changing the engine oil
CAUTION
A
N ENGINE AT OPERATING TEMPERATURE AND THE ENGINE OIL IT CONTAINS ARE
VERY HOT
– DO NOT BURN OR SCALD YOURSELF.
NOTE: When changing the engine oil, it is necessary to clean the oil screen
and to replace the oil filter. Engine oil has be changed with the engine at
an operating temperature..
– Place the motorcycle on a level surface.
– Remove the oil drain plug
3 and allow the engine oil to drain into a
pan.
– Relieve the plug
4 by tapping gently a few times with a hammer.
– Remove the plug with the oil screen.
– Allow the engine oil to drain completely and clean the sealing areas.
– Thoroughly clean all parts.
– Check the O-rings for damage and replace if necessary.
– Mount the oil drain plug with a new seal ring and tighten to 20 Nm.
– Mount the plug with the oil screen and tighten to 30 Nm.
Repair manual KTM 450/505 SX-F Art.-Nr. 3.206.029-E
2-2
2
1
when the engine is cold
10 mm
5°C
41°F
10W/50
5W/40
JASO T903 MA
TEMPERATURE
3
4
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