KTM 545 XC ATV EU 2011 Owner's Manual page 177

MAINTENANCE WORK ON THE ENGINE
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Place a suitable container under the engine.
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Remove the oil drain plug
302845-10
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Remove the plug screw
302844-10
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Remove the plug screw
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Completely drain the engine oil.
601067-10
.
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and small oil screen with both O-rings.
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and large oil screen with both O-rings.
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175