Yamaha YZ450F(X), Owner'S Service Manual

Page: 161 / 574

5-34
SWINGARM
HANDLING NOTE
Support the machine securely so
there is no danger of it falling over.
REMOVING THE CAP
1. Remove:
• Left cap "1"
Remove with a slotted-head screw-
driver inserted under the mark "a" on
the left cap.
REMOVING THE BEARING
1. Remove:
• Bearing "1"
Remove the bearing by pressing its
outer race.
CHECKING THE SWINGARM
1. Inspect:
• Bearing "1"
• Bushing "2"
Free play exists/unsmooth revolu-
tion/rust
→
Replace bearing and
bushing as a set.
2. Inspect:
• Oil seal "3"
Damage
→
Replace.
CHECKING THE RELAY ARM
1. Inspect:
• Bearing "1"
• Collar "2"
Free play exists/unsmooth revolu-
tion/rust
→
Replace bearing and
collar as a set.
2. Inspect:
• Oil seal "3"
Damage
→
Replace.
CHECKING THE CONNECTING
ROD
1. Inspect:
• Bearing "1"
• Collar "2"
Free play exists/unsmooth revolu-
tion/rust
→
Replace bearing and
collar as a set.
2. Inspect:
• Oil seal "3"
Damage
→
Replace.
INSTALLING THE BEARING AND
OIL SEAL
1. Install:
• Bearing "1"
• Oil seal "2"
To swingarm.
• Apply the molybdenum disulfide
grease on the bearing when install-
ing.
• Install the bearing by pressing it on
the side having the manufacture's
marks or numbers.
• First install the outer and then the
inner bearings to a specified depth
from inside.
2. Install:
• Bearing "1"
• Washer "2"
• Oil seal "3"
To relay arm.
• Apply the molybdenum disulfide
grease on the bearing when install-
ing.
• Install the bearing by pressing it on
the side having the manufacture's
marks or numbers.
• Apply the molybdenum disulfide
grease on the washer.
3. Install:
• Bearing "1"
• Oil seal "2"
To connecting rod.
• Apply the molybdenum disulfide
grease on the bearing when install-
ing.
• Install the bearing by pressing it on
the side having the manufacture's
marks or numbers.
Installed depth of bear-
ings:
Outer "a": Zero mm
(Zero in)
Inner "b": 6.5 mm (0.26
in)
Installed depth of bear-
ings "a":
Zero mm (Zero in)
Installed depth of bear-
ings "a":
Zero mm (Zero in)