Removing The Swingarm; Checking The Swingarm - Yamaha WR450FB 2012 Owner's Service Manual

EAS23350
REMOVING THE SWINGARM
1. Stand the vehicle on a level surface.
EWA13120
A
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
TIP _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Place the vehicle on a suitable stand so that the
rear wheel is elevated.
2. Remove:
• Left cap "1"
TIP _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Remove with a slotted-head screw-driver in-
serted under the mark "a" on the left cap.
3. Measure:
• Swingarm side play
• Swingarm vertical movement
TTTTTTT~TTTTTTTTTTTTTTTTTTTTT~TT
a. Measure the tightening torque of the pivot
shaft nut.
Pivot shaft nut
85 Nm (8.5 m·kgf, 61 ft· I bf)
b. Measure the swingarm side play "a" by mov-
ing the swingarm from side to side.
c. If the swingarm side play is out of specifica-
tion, check the spacers, bearings and col-
lars.
d. 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 spacers,
bearings and collars.
Swingarm side play {at the end of
the swingarm)
o
mm (O in)
5-69
SWINGARM
EAS23360
CHECKING THE SWINGARM
1. Check:
• Swingarm
Bends/cracks/damage
4
Replace.
2. Check:
• Pivot shaft
Roll the pivot shaft on a flat surface.
Bends
4
Replace.
EWA13770
AwARNING
Do not attempt to straighten a bent pivot
shaft.
3. Wash:
• Pivot shaft
•Spacers
•Collars
•Bearings
Recommended cleaning solvent
Kerosene
4. Check:
•Oil seals
Damage
4
Replace.
•Bearings
•Spacers
Free play exists/unsmooth revolution/rust
4
Replace bearing and bushing as a set.