Yamaha YZ450FP 2023, Owner'S Service Manual

Page: 92 / 388

ENGINE
3-14
4. Check:
• Engine oil level
The engine oil level should be between the
minimum level (lower edge of the oil check
window “1”) and the maximum level mark “a”.
Below the minimum level

Add the recom-
mended engine oil to the proper level.
TIP
Before checking the engine oil level, wait a few
minutes until the oil has settled.
NOTICE
ECA13361
• Engine oil also lubricates 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 CONSERVING II”.
• Do not allow foreign materials to enter the
crankcase.
5. Start the engine, warm it up for several min-
utes, and then turn it off.
6. Check the engine oil level again.
TIP
Before checking the engine oil level, wait a few
minutes until the oil has settled.
EAM30225
CHANGING THE ENGINE OIL
1. Stand the vehicle upright on a level surface.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Place a container under the engine oil drain
bolts.
4. Remove:
•
Oil filler cap
(along with the O-ring)
5. Remove:
• Engine oil drain bolt (crankcase) “1”
(along with the gasket “2”)
• Engine oil drain bolt (oil tank) “3”
(along with the gasket “4”)
6. Drain:
•
Engine oil
(completely from the oil tank and crankcase)
7. If the oil filter element is also to be replaced,
perform the following procedure.
a. Remove the oil filter element cover “1”, oil
filter element “2”.
b. Replace the new O-ring “3”.
Recommended brand
YAMALUBE
SAE viscosity grades
10W-40, 10W-50, 15W-40, 20W-
40 or 20W-50
Recommended engine oil grade
API service SG type or higher,
JASO standard MA
a
1
a
1
2
3
4