2007 Yamaha Motorsports Morphous Owners Manual - Page 56

2007 Yamaha Motorsports Morphous Manual

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PERIODIC MAINTENANCE AND MINOR REPAIR ed in the owner's tool kit. other deposits, and replace it if necessary. Specified spark plug: NGK/CPR7EA-9 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: 12.5 Nm (1.25 m·kgf, 9 ft·lbf) 1. Spark plug wrench To install the spark plug 1. Measure the spark plug gap with a wire thickness gauge and, if necessary, adjust the gap to specification. 6 To check the spark plug 1. Check that the porcelain insulator around the center electrode of the spark plug is a medium-to-light tan (the ideal color when the vehicle is ridden normally). NOTE: _ If the 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. 2. Check the spark plug for electrode erosion and excessive carbon or NOTE: If a torque wrench is not available when installing a spark plug, a good estimate of the correct torque is 1/4-1/2 turn past finger tight. However, the spark plug should be tightened to the specified torque as soon as possible. 4. Install the spark plug cap. NOTE:. Make sure the spark plug wire is fastened in the clamp as shown. 1 1. Spark plug gap Spark plug gap: 0.8-0.9 mm (0.031-0.035 in) 2. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any grime from the 6-14

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6
PERIODIC MAINTENANCE AND MINOR REPAIR
ed in the owner’s tool kit.
other deposits, and replace it if
necessary.
Specified spark plug:
NGK/CPR7EA-9
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
To check the spark plug
1.
Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
NOTE:
_
To install the spark plug
1.
Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
Tightening torque:
Spark
plug:
12.5 Nm (1.25 m·kgf, 9 ft·lbf)
1
NOTE:
If a torque wrench is not available when
installing a spark
plug,
a good estimate
of the correct torque is
1/4-1/2
turn
past finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.
4.
Install the spark plug cap.
NOTE:.
Make sure the spark plug wire is fas-
tened in the clamp as shown.
If the 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.
1.
Spark plug gap
Spark plug gap:
0.8-0.9
mm (0.031-0.035 in)
2.
Check the spark plug for electrode
erosion and excessive carbon or
2.
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
6-14