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B. Consider the following
Inspection Notes:
(1) During coasting, accelerating or decelerating, the "rolling rumble" will increase with rear
wheel speed, not engine or transmission gear speeds. However, such noise may also be due to
wheel bearings.
(2) Noise that varies with acceleration and deceleration: Following incorrect reassembly, a condi-
tion of too-little gear lash may produce a whine during deceleration.
CAUTION:
Too-little gear lash is extremely destructive to gear teeth. If a test ride following reassembly
indicates this condition, stop riding immediately to minimize damage to gears.
(3) A slight "thunk" must be distinguished from normal machine 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
locking-up of the shaft drive assembly and result in harm to a rider.
(4) If the drive flange/ball joint bolts are slightly loose, a "clunk" may be felt when slowly taking
off, or when changing from slow acceleration to slow deceleration. At high speed this will
result in vibration.
WARNING:
Do not continue riding a machine suspected of having loose flange/ball joint bolts. The com-
ponents may break, causing injury to a rider.
C. Troubleshooting Chart
Where Basic Conditions (1) and (2) above exist, consider the following Chart:
Feel for wheel bearing damage.
Check rear wheel (with brake caliper
removed). Feel for bearing damage.
Remove rear wheel
bearing damage.
Remove drive shaft components.
Inspect according to proper section of
manual.
N o
Yes
N o
Replace wheel bearing.
(See XS750D Service Manual)
Rear wheel bearings and shaft drive
probably
bearing s
Repeat test or remove individual
components.
Replace rear wheel bearing.
not damaged.
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