8-4
ESS51101
TOOL KIT
The owner’s tool kit has the tools which are sufficient for
most periodic maintenance and minor repair. A torque
wrench is also necessary to properly tighten nuts and bolts.
1
Tool kit
Å
PZ500/PZ500ML
ı
VT500XL
CAUTION:
Before starting the engine, make sure that the tool kit
box is firmly seated in the holder and is secured with
the holding band.
NOTE:
If you do not have a torque wrench available during a
service operation which requires one, take your machine to
a Yamaha dealer to check the torque settings and adjust
them if necessary.
ESS52000
SPARK PLUG INSPECTION
The spark plug is an important engine component and is
easy to inspect. The condition of the spark plug can
indicate the condition of the engine. Check the coloration
on the white porcelain insulator around the center elec-
trode. The ideal coloration at this point is a medium to a light
tan color for a machine that is being ridden normally. If a
spark plug shows a distinctly different color, there could be
something wrong with the engine. For example, a very
white center electrode porcelain color could indicate an
intake track air leak or carburetion problem for that cylin-
der. Do not attempt to diagnose such problems yourself.
Instead, take the machine to your Yamaha dealer. You
should periodically remove and inspect the spark plug
because heat and deposits will cause a spark plug to slowly
break down and erode. Consult your dealer before chang-
ing to a different type of spark plug.
Standard spark plug: BR9ES (NGK)
B
A
846-032
846-028