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6. Add the recommended final gear oil to
the brim of the filler hole.
CAUTION:
_
Be sure no foreign material enters the final
gear case.
_
7. Install the oil filler bolt.
8. Check for oil leakage. If oil leakage is
found, check for the cause.
9. Install the final gear case cover bolts, and
then tighten them to the specified torque.
EBU11820
Spark plug inspection
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate the condition of
the engine.
For example, a very white center electrode
porcelain color could indicate an intake air
leak or carburetion problem for that cylinder.
Do not attempt to diagnose such problems
yourself.
Instead, take the ATV to a Yamaha dealer.
You should periodically remove and inspect
the spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode. If electrode erosion becomes ex-
cessive, you should replace the spark plug
with one of the proper type.
Recommended oil:
See page 10-3.
Oil quantity:
0.25 L (0.22 Imp qt, 0.26 US qt)
Tightening torque:
Final gear case cover bolt:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Standard spark plug:
DR7EA (NGK)
U4XE16.book Page 11 Monday, March 24, 2003 3:14 PM