Yamaha XVS1300AF Owner's Manual page 52

PERIODIC MAINTENANCE AND ADJUSTMENT
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
7
purchase of the vehicle.
1. Spark plug wrench
To check the spark plugs
1. Check that the porcelain insulator
around the center electrode on
each spark plug is a medium-to-
light tan (the ideal color when the
vehicle is ridden normally).
1
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.
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/LMAR7A-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
To install a spark plug
1. Clean the surface of the spark
2. Install the spark plug with the
7-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
spark plug wrench, and then tight-
en it to the specified torque.
Tightening torque:
Spark plug:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)