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Removing The Swingarm; Checking The Swingarm; Installing The Swingarm - Yamaha YZ 2023 Series Owner's Service Manual

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EAM30071

REMOVING THE SWINGARM

1. Use a maintenance stand to raise the rear
wheel off the ground.
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
2. Measure:
• Swingarm side play
• Swingarm vertical movement
a. Measure the tightening torque of the pivot
shaft nut.
Pivot shaft nut
85 N·m (8.5 kgf·m, 63 lb·ft)
b. Check the swingarm side play "a" by mov-
ing the swingarm from side to side. If the
swingarm has side-to-side play, check the
bushings, the bearings, and the collars.
c. Check the swingarm vertical movement
"b" by moving the swingarm up and down.
If swingarm vertical movement is not
smooth or if there is binding, check the
bushings, the bearings, and the collars.
EAM30073

CHECKING THE SWINGARM

1. Check:
• Swingarm
Bends/cracks/damage  Replace.
2. Check:
• Pivot shaft
Roll the pivot shaft on a flat surface.
Bends  Replace.
EWA13770
WARNING
Do not attempt to straighten a bent pivot
shaft.
3. Wash with kerosene:
• Pivot shaft
• Bushing
• Collar
• Bearing
4. Check:
• Oil seal
Damage  Replace.
• Bearing
• Bushing
Free play exists/unsmooth revolution/rust 
Replace bearing and bushing as a set.
EAM30074

INSTALLING THE SWINGARM

1. Lubricate:
• Bearing
• Thrust bearing
• Collar
• Bushing
• Oil seal
• Pivot shaft
2. Install:
• Bearing "1"
• Oil seal "2"
(to the swingarm)
• Collar "3"
b
TIP
First install the outer and then the inner bearings
a
to a specified depth from inside.
3. Install:
• Swingarm
TIP
Install the pivot shaft from the right.
4-65
SWINGARM
Recommended lubricant
Molybdenum disulfide grease
New
Installed depth "a"
0–0.5 mm (0–0.02 in)
Installed depth "b"
6.5 mm (0.26 in)
a
a
a
New
New
New
2
2
1
b
b
3
Pivot shaft nut
85 N·m (8.5 kgf·m, 63 lb·ft)
a
2
1
3

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Yz250fx 2023Yz250fxp 2023

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