Shaft Drive; Troubleshooting - Yamaha XZ550RJ 1982 Service Manual

Troubleshooting

The following conditions may indicate damaged
shaft drive components:
NOTE:
Damage areas A, B, C, and D above may be extremely difficult to diagnose. The symptoms are quite subtle
and difficult to distinguish from normal motorcycle operating noise. If there is reason to believe these com-
ponents are damaged, remove the components for specific inspection.
Inspection notes:
1. During coasting, accelerating, or deceler-
ating, the "rolling rumble" will increase with
rear wheel speed, not engine or transmis-
sion gear speeds. However, such noise may
also be due to damaged wheel bearings.
2. Noise that varies with acceleration and de-
celeration:
sembly, a condition of too-little gear lash
may produce a whine during deceleration.
CAUTION:
Too-little gear lash is extremely destructive to
the gear teeth. If a test ride following reassembly
indicates this condition, stop riding immediately
to minimize damage to the gears.
following incorrect
3. A slight "thunk" must be distinguished from nor-
mal motorcycle operation. It will be most noticeable
at low speed and could indicate broken gear teeth.
WARNING:
If broken gear teeth are suspected, stop riding
immediately. This condition could lead to lock-
reas-
ing-up of the shaft drive assembly and result in
harm to a rider.
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