Yamaha 5YF2-AE1, Service Manual

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TRBL
SHTG
FAULTY DRIVE TRAIN
EBS00540
FAULTY DRIVE TRAIN
The following conditions may indicate damaged shaft drive components:
NOTE:
_
Areas A, B, and C above may be extremely difficult to diagnose. The symptoms are quite subtle and
difficult to distinguish from normal machine operating noise. If there is reason to believe these com-
ponents are damaged, remove the components and check them.
Symptoms Possible Causes
1. A pronounced hesitation or “jerky” move-
ment during acceleration, deceleration, or
sustained speed. (This must not be con-
fused with engine surging or transmission
characteristics.)
2. A “rolling rumble” noticeable at low speed; a
high-pitched whine; a “clunk” from a shaft
drive component or area.
3. A locked-up condition of the shaft drive
mechanism, no power transmitted from the
engine to the rear wheels.
A. Bearing damage.
B. Improper gear lash.
C. Gear tooth damage.
D. Broken drive shaft.
E. Broken gear teeth.
F. Seizure due to lack of lubrication.
G. Small foreign objects lodged between the
moving parts.