2004 Yamaha Motorsports RX-1 Mountain Owners Manual - Page 56

2004 Yamaha Motorsports RX-1 Mountain Manual

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ESU00376 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 CAUTION: @ Before starting the engine, make sure that the tool kit is firmly seated in the holder and is closed securely. @ NOTE: @ If you do not have a torque wrench available during a service operation requiring one, take your snowmobile to a Yamaha dealer to check the torque settings and adjust them if necessary. @ ESU00368 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 electrode. The ideal coloration at this point is a medium to a light tan color for a snowmobile 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 cylinder. Do not attempt to diagnose such problems yourself. Instead, take the snowmobile to a Yamaha dealer for inspection and possible repairs. 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 a Yamaha dealer before changing to a different type of spark plug. Specified spark plug: · R · CR9E (NGK) or CR9E (NGK) 8-4

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8-4
ESU00376
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
CAUTION
:
@
Before starting the engine, make sure that the tool
kit is firmly seated in the holder and is closed
securely.
@
NOTE:
@
If you do not have a torque wrench available during a
service operation requiring one, take your snowmobile to
a Yamaha dealer to check the torque settings and adjust
them if necessary.
@
ESU00368
Spark plug inspection
The spark plug is an important engine component and is
easy to inspect. The condition of the spark plug can indi-
cate the condition of the engine. Check the coloration on
the white porcelain insulator around the center electrode.
The ideal coloration at this point is a medium to a light
tan color for a snowmobile 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 indi-
cate an intake track air leak or carburetion problem for
that cylinder. Do not attempt to diagnose such problems
yourself. Instead, take the snowmobile to a Yamaha
dealer for inspection and possible repairs. 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 a Yamaha dealer before chang-
ing to a different type of spark plug.
Specified spark plug:
· R · CR9E (NGK)
or
CR9E (NGK)