Faulty Drive Train - Yamaha YXR70FX Service Manual

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EBS00540

FAULTY DRIVE TRAIN

The following conditions may indicate damaged shaft drive components:
Symptoms
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 front and/or rear wheels.
TIP:
_
Areas A, B, and C above may be extremely difficult to diagnose. The symptoms are quite subtle and
difficult to distinguish from normal vehicle operating noise. If there is reason to believe these compo-
nents are damaged, remove the components and check them.
FAULTY DRIVE TRAIN
Possible Causes
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.
10 - 3
TRBL
SHTG

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Rhino 700 2008Rhino 700fi 2008Rhino yxr70fx 2008

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