2012 Yamaha Motorsports Stryker Owners Manual - Page 51

2012 Yamaha Motorsports Stryker Manual

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U27D11E0.book Page 10 Monday, July 11, 2011 11:15 AM PERIODIC MAINTENANCE AND ADJUSTMENT 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. TIP If any spark plug shows a distinctly different color, the engine could be operating improperly. 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. Specified spark plug: NGK/LMAR7A-9 1. Spark plug gap 1 1. Spark plug cap 3. Remove the spark plug as shown, with the spark plug wrench included in the additional tool kit, which was handed out separately at the purchase of the vehicle. Spark plug gap: 0.8-0.9 mm (0.031-0.035 in) To install a spark plug 1. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any grime from the spark plug threads. 2. Install the spark plug with the spark plug wrench, and then tighten it to the specified torque. Tightening torque: Spark plug: 13 Nm (1.3 m·kgf, 9.4 ft·lbf) 7 1. Spark plug wrench 4. Measure the spark plug gap with a wire thickness gauge and, if necessary, adjust the gap to specification. 7-10

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PERIODIC MAINTENANCE AND ADJUSTMENT
7-10
7
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.
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.
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.
4.
Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
To install a spark plug
1.
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
2. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
1.
Spark plug cap
1.
Spark plug wrench
1
Specified spark plug:
NGK/LMAR7A-9
1.
Spark plug gap
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
U27D11E0.book
Page 10
Monday, July 11, 2011
11:15 AM