Checking The Fuel Line; Checking The Engine Oil Level - Yamaha YZ450FX 2019 Owner's Service Manual

4. Install:
• Exhaust pipe protector
Exhaust pipe protector screw
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
EAM30222

CHECKING THE FUEL LINE

1. Remove:
• Seat
• Side cover (left/right)
• Air scoop (left/right)
Refer to "GENERAL CHASSIS" on page 4-1.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
2. Check:
• Fuel hose "1"
Crack/damage  Replace.
Loose connection  Connect properly.
1
3. Install:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air scoop (left/right)
• Seat
• Side cover (left/right)
Refer to "GENERAL CHASSIS" on page 4-1.
EAM30224

CHECKING THE ENGINE OIL LEVEL

1. Stand the vehicle upright on a level surface.
2. Start the engine, warm this up for 2–3 min-
utes, and then stop the engine and wait about
4
3
3-13
1 minute.
3. Check:
• Oil level
Make sure that the engine oil level is above
the minimum level mark "a" shown for the oil
level check window "1", and that the engine
oil does not come out by removing the oil
check bolt "2".
The minimum level mark "a" or below  Add
the engine oil until its level exceeds the mini-
mum level mark "a".
Engine oil coming out of the oil check bolt 
Drain it until its last drop is out.
1
2
ECA24290
NOTICE
• Since engine oil also lubricates the clutch,
the wrong oil types or additives could
cause clutch slippage. Therefore, do not
add any chemical additives.
• Do not allow foreign material to enter the
crankcase.
Recommended brand
YAMALUBE
SAE viscosity grades
SAE 10W-40, SAE 10W-50, SAE
15W-40, SAE 20W-40 or SAE
20W-50
Recommended engine oil grade
API service SG type or higher,
JASO standard MA
ENGINE
a