Yamaha YZ450FY 2009 Owner's Service Manual page 77

• Engine oil also luburicates the clatch and
the wrong oil types or additives could
cause clatch slippage. Therefore, do not
oils with a grade of CD "a" or higher and
do not use oils labeled "ENERGY CON-
SERVING II" "b" .
• Do not allow foreign material to enter the
crankcase.
(For USA and CDN)
Recommended oil:
Yamalube 4, SAE10W-40 or
SAE20W-50
Yamalube 4-R, SAE10W-50
API service SG type or higher,
JASO standard MA
4
3-12
(Except for USA and CDN)
Recommended oil:
SAE10W-30, SAE10W-40,
SAE15W-40, SAE20W-40 or
SAE20W-50
API service SG type or higher,
JASO standard MA
5. Start the engine and let it warm up for sever-
al minutes.
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 maximum level.
7. Install:
• Oil tank cap
CHANGING THE ENGINE OIL
1. Start the engine and let it warm up for sever-
al 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.
ENGINE