Yamaha YFM70RY Service Manual page 88

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7. Adjust:
• Valve clearance
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a. Loosen the locknut "1".
b. Insert a thickness gauge "2" between the end
of the adjusting screw and the valve tip.
c. Turn the adjusting screw "3" with the tappet
adjusting tool "4" in direction "a" or "b" until the
specified valve clearance is obtained.
b
a
4
Direction "a"
Valve clearance is increased.
Direction "b"
Valve clearance is decreased.
Tappet adjusting tool
90890-01311
Six piece tappet set
YM-A5970
1
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3
1
2
• Hold the adjusting screw to prevent it from
moving and tighten the locknut to specifica-
tion.
d. Measure the valve clearance again.
e. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance adjust-
ment steps until the specified clearance is
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obtained.
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8. Install:
MMM
• Timing mark accessing screw
• Crankshaft end accessing screw
• Spark plug
9. Connect:
• Spark plug cap
10.Install:
• O-ring
• Camshaft sprocket cover
• O-ring "1"
• Intake tappet cover
• O-ring
• Exhaust tappet cover
1
New
11.Install:
• Fuel tank
3-5
Locknut
14 Nm (1.4 m·kg, 10 ft·lb)
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Timing mark accessing screw
6 Nm (0.6 m·kg, 4.3 ft·lb)
Crankshaft end accessing screw
10 Nm (1.0 m·kg, 7.2 ft·lb)
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
New
New
New
Camshaft sprocket cover bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
Intake tappet cover bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
Exhaust tappet cover bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
ENGINE
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