Yamaha Bolt XVS95CH Owner's Manual page 53

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1. Spark plug cover
2. Bolt
2. Remove the spark plug cap.
1. Spark plug cap
3. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the additional tool kit, which
was handed out separately at the
purchase of the vehicle.
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1. Spark plug wrench
To check the spark plugs
1. Check that the porcelain insulator
around the center electrode on
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each spark plug is a medium-to-
light tan (the ideal color when the
vehicle is ridden normally).
2. Check that all spark plugs in-
stalled in the engine have the
same color.
TIP
If any spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer check
the vehicle.
Periodic maintenance and adjustment
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7-10
3. Check each spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replace
it if necessary.
Specified spark plug:
NGK/CPR7EA-9
4. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifi-
cation.
1. Spark plug gap
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
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