Yamaha YZ450F Manuel D'atelier Du Proprietaire page 178

Temp.
-20 -10 0 10 20
10W-30
10W-40
15W-40
20W-40
20W-50
-4 14 30 50 68
ENGINE OIL LEVEL INSPECTION
a
b
°C
30 40 50
86 104
122
°F
a
b
3 - 14
4. Inspect:
Oil level
G
Oil level should be between maximum
a and minimum b marks.
Oil level low → Add oil to proper level.
NOTE:
When inspecting the oil level, do not screw the
oil level gauge into the oil tank.
Insert the gauge lightly.
(For USA and CDN)
Recommended oil:
At 5 ˚C (40 ˚F) or higher Å
Yamalube 4 (20W-40) or SAE
20W-40 type SG motor oil
(Non-Friction modified)
At 15 ˚C (60 ˚F) or lower ı
Yamalube 4 (10W-30) or SAE
10W-30 type SG motor oil
(Non-Friction modified)
and/or
Yamalube 4-R (15W-50)
(Non-Friction modified)
CAUTION:
Do not add any chemical additives.
G
Engine oil also lubricates the clutch and
additives could cause clutch slippage.
Do not allow foreign material to enter the
G
crankcase.
(Except for USA and CDN)
Recommended oil:
Refer to the following chart for
selection of oils which are suited
to the atmospheric temperatures.
Recommended engine oil classi-
fication:
API STANDARD:
API "SG" or higher grade
(Designed primarily for motor-
cycles)
CAUTION:
Do not add any chemical additives or use
G
oils with a grade of CD a or higher.
Do not use oils labeled "ENERGY CON-
G
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
G
crankcase.
INSP
ADJ