Yamaha YZ450F, Owner'S Service Manual

Page: 174 / 650

3 - 15
INSP
ADJ
ENGINE OIL REPLACEMENT
CAUTION:
• Do not add any chemical additives or use
oils with a grade of CD
a
or higher.
• Do not use oils labeled “ENERGY CON-
SERVING II”
b
or higher. Engine oil also
lubricates the clutch and additives could
cause clutch slippage.
• Do not allow foreign materials to enter the
crankcase.
a
b
5. Start the engine and let it warm up for sev-
eral minutes.
CAUTION:
When the oil tank is empty, never start the
engine.
6. Idle the engine more than 10 seconds
while keeping the machine upright. Then
stop the engine and add the oil to the maxi-
mum level.
7. Install:
• Oil tank cap
ENGINE OIL REPLACEMENT
1. Start the engine and let it warm up for sev-
eral minutes.
2. Stop the engine and place an oil pan under
the drain bolt.
3. Remove:
• Oil tank plug
1
• Oil filler cap
2
• Drain bolt (with gasket)
3
• Oil filter drain bolt (O-ring)
4
• Drain bolt (with gasket)
5
Drain the crankcase and oil tank of its oil.