center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
TIP
If the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a dealer check the ATV.
2. Check the spark plug gap for electrode erosion and excessive
carbon or other deposits, and replace it if necessary.
3. Measure the spark plug gap with a wire thickness gauge
and, if necessary, adjust the gap to specification.
1. Spark plug gap
To install the spark plug
1. Clean the surface of the spark plug gasket and its mating
surface, and then wipe off any grime from the the spark
plug threads.
2. Install the spark plug with the spark plug wrench, and then
tighten it to the specified torque.
TIP
If a torque wrench is not available when installing the spark plug,
a good estimate of the correct torque is 1/4-1/2 turn past finger
tight.However, the spark should be tightened to the specified
torque as soon as possible.
3. Install the spark plug cap.
Engine oil
The engine oil level should be checked before each ride, in
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