2005 Yamaha Motorsports V Star 1100 Classic Owners Manual - Page 49

2005 Yamaha Motorsports V Star 1100 Classic Manual

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PERIODIC MAINTENANCE AND MINOR REPAIR 3. Remove the spark plug as shown, with the spark plug wrench included in the owner's tool kit. NOTE: If any spark plug shows a distinctly different color, the engine could be defective. Do not attempt to diagnose such problems yourself. Instead, have a Yamaha dealer check the vehicle. 3. Check each spark plug for electrode erosion and excessive carbon or other deposits, and replace it if necessary. 1. Spark plug wrench 1. Spark plug gap Specified spark plug: NGK/BPR7ES DENSO/W22EPR-U Spark plug gap: 0.7-0.8 mm (0.028-0.031 in) To check the spark plugs 1. Check that the porcelain insulator around the center electrode on each spark plug is a medium-tolight tan (the ideal color when the vehicle is ridden normally). 2. Check that all spark plugs installed in the engine have the same color. To install a spark plug 1. Measure the spark plug gap with a wire thickness gauge and, if necessary, adjust the gap to specification. 2. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any grime from the spark plug threads. 3. Install the spark plug with the spark plug wrench, and then tighten it to the specified torque. Tightening torque: Spark plug: 20 Nm (2.0 m·kgf, 14.5 ft·lbf) 6 6-9

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PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
3.
Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
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).
2.
Check that all spark plugs installed
in the engine have the same color.
NOTE:
If any spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, 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.
To install a spark plug
1.
Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
2.
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
1.
Spark plug wrench
Specified spark plug:
NGK/BPR7ES
DENSO/W22EPR-U
1.
Spark plug gap
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Tightening torque:
Spark plug:
20 Nm (2.0 m·kgf, 14.5 ft·lbf)