Yamaha MBK MW125 2014, Service Manual

Page: 87 / 380

PERIODIC MAINTENANCE
3-6
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6. 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” in direction “a” or
“b” with the tappet adjusting tool “4” until the
specified valve clearance is obtained.
d. Hold the adjusting screw to prevent it from
moving and tighten the locknut to specifica-
tion.
e. Measure the valve clearance again.
f. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance adjust-
ment steps until the specified clearance is
obtained.
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7. Install:
• Radiator
8. Install:
• Radiator cover
9. Install:
• Cylinder head cover gasket
• Cylinder head cover
• Spark plug
• Spark plug cap
• Cylinder head breather hose
10.Install:
• Center side covers
• Storage box
• Center cover
Refer to “GENERAL CHASSIS (1)” on page
4-1, “GENERAL CHASSIS (2)” on page 4-3
and “GENERAL CHASSIS (3)” on page 4-5.
EAS31179
CHECKING THE BREATHER HOSES
1. Remove:
• Center panel
• Storage box
Refer to “GENERAL CHASSIS (1)” on page
4-1 and “GENERAL CHASSIS (2)” on page
4-3.
Direction “a”
Valve clearance is increased.
Direction “b”
Valve clearance is decreased.
Tappet adjusting tool
90890-01311
Six piece tappet set
YM-A5970
1
1
2
3
b
a
4
T
R
.
.
Valve clearance adjusting screw
locknut
7 Nm (0.7 m·kgf, 5.1 ft·lbf)
T
R
.
.
Radiator bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
T
R
.
.
Radiator cover bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
T
R
.
.
Cylinder head cover bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
New