Yamaha YZ 2018 Series, Owner'S Service Manual

Page: 101 / 402

ENGINE
3-15
EASB29B086
CHANGING THE ENGINE OIL
Stand the vehicle upright on a level surface.
1. Start the engine, warm this up for 3 minutes,
and then stop the engine and wait about 5
minutes.
2. Place an oil pan under the drain bolt.
3. Remove:
• Engine guard “1” (For JPN)
• Oil filler cap “2”
• Drain bolt (with gasket) “3”
4. If the oil filter element is also to be replaced,
perform the following procedure.
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a. Remove the oil filter element cover “1” and
oil filter element “2”.
b. Replace the O-ring “3”.
c. Install the new oil filter element and the oil fil-
ter element cover.
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5. To check the oil strainer, perform the follow-
ing procedure.
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a. Remove the oil strainer “1”.
b. Check the oil strainer.
Damage

Replace.
Clogging due to dirt

Wash with kerosene.
c. Replace the O-ring “2”.
d. Install the oil strainer.
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6. Install:
• Gasket
• Drain bolt
7. Pour the specified amount of engine oil into
the oil filler cap hole.
Oil filter element cover bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
1
2
3
1
3
2
New
T
R
.
.
Oil strainer bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Drain bolt
20 N·m (2.0 kgf·m, 15 lb·ft)
Engine oil quantity
Oil change
0.83 L (0.88 US qt, 0.73 Imp.qt)
With oil filter removal
0.85 L (0.90 US qt, 0.75 Imp.qt)
Quantity (disassembled)
1.10 L (1.16 US qt, 0.97 Imp.qt)
1
2 New
T
R
.
.
New
T
R
.
.