The Yamaha factory
service manual (page 3-2) says to check the swingarm pivot bearing every
8,000 miles (or 12 month) and to repack it every 16,000 miles (or 24 months).
That's every 12,000 Km for the check and every 25,000 Km for the repack
if you're into metrics.
The process is
not technically difficult, but can take a little time. Because of the
other subsystems you need to remove to do the swingarm service, I would
recommend that you also do your periodic maintenance on your rear wheel,
drive shaft, and u-joint. If you're up for it, now's also a good time
to service your rear brake caliper and lube the various pivot points (side
stand, center stand, shock, shifter linkages, etc.). A 2003 non-ABS was
used for the example and photos.
Let's get started.
1. Remove the
mufflers (easier access for the rest of the project)
the rear wheel
A) Tip: Suspend the brake caliper from a coat hanger to avoid stress
on the brake line
the drive shaft assembly as you do when servicing
4. Remove the right
and left rider
A) Note the T-50 torx head bolt on the left footrest bracket (arrow)
5. Remove the u-joint
(now's a good time to service it)
6. Remove the rear shock (now's a good time to service the pivot points)
A) Remove the right pivot shaft end cap (#2) and the left, triangular,
end cap (#3)
B) Remove the right pivot shaft nut (#4: 27mm) and the left lock
nut (#5: 36mm)
C) Remove the pivot shaft from the left side of the bike
(CAUTION: Keep track
of all spacers, washers, and bushings so they go back in the proper
order during reassembly.)
D) Clean the the
swingarm and associated parts (internally and externally)
E) Grease all bearing surfaces and pack the area around the swingarm
pivot bearing with an approved grease (I use Mobile 1 full synth
F ) Clean the rear undercarriage of the bike
G ) Reassemble in reverse order
A quick Google search will net 36mm sockets from several sources.
The 27 mm socket was already
in my tool kit and useful elsewhere on the FJR.
I bought the T-50 torx socket
from Pep Boys as part of a kit that had it as the middle size in a kit
The other tools were standard
things already in my tool kit from other projects.
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