Yamaha YZ450FA Automobile User Manual


 
3-13
ENGINE
3. Install:
• Air filter
• Fuel tank
• Air scoop (left/right)
• Seat
CHECKING THE FUEL LINE
1. Remove:
• Seat
• Fuel tank
• Air scoop (left/right)
• Air filter case
•Cover
2. Check:
• Fuel hose "1"
Cracks/damage Replace.
Loose connection Reconnect.
3. Install:
•Cover
• Air filter case
• Air scoop (left/right)
• Fuel tank
• Seat
CHECKING THE ENGINE OIL LEVEL
1. Stand the machine on a level surface.
• When checking the oil level make sure that
the machine is upright.
• Place the machine on a suitable stand.
2. Start the engine, warm it up for 2–3 minutes
at engine idling speed, and then stop the en-
gine and wait approximately 1 minute.
3. Inspect:
• Oil level
Make sure that the engine oil level is be-
tween the maximum level line "a" and mini-
mum level line "b" shown for the oil level
check window.
Above the upper limit "a"Check that no oil
comes out when the check bolt "1" for the oil
quantity upper limit is removed.
If any engine oil comes out, drain it until its
last drop is out.
Below the level mark "b" Add sufficient oil
and idle run the engine, and after stopping
the engine, recheck through the oil inspec-
tion window that the oil is at the specified
level.
• Check the oil quantity within 5 minutes after
the engine is shut off. Over 5 minutes, idle the
engine again and recheck the oil quantity.
Do not leave the check bolt for the oil quantity
upper limit removed. Otherwise, the oil level
drops with time in the engine, allowing the oil
to flow out.
• Engine oil also luburicates the clutch and
the wrong oil types or additives could
cause clutch slippage. Therefore, do not
add any chemical additives or use engine
oils with a grade of CD or higher and do
not use oils labeled "ENERGY CONSERV-
ING II".
• Do not allow foreign material to enter the
crankcase.