Thickness Gauge - Yamaha MT-03 Service Manual

NOTE:
To position the piston at top dead center (TDC)
on the compression stroke, align the "I" mark
"c" on the camshaft sprocket with the stationary
pointer "d" on the cylinder head, as shown in
the illustration.
d
c
c. Measure the valve clearance with a thick-
ness gauge "1".
Out of specification

Thickness gauge

90890-03079
7. Adjust:
• Valve clearance
a. Loosen the locknut "1".
b. Insert a thickness gauge "2" between the
end of the adjusting screw and the valve tip.
3
Adjust.
1
1
2
c. Turn the adjusting screw "3" in direction "a"
or "b" until the specified valve clearance is
obtained.
Direction "a"
Valve clearance is increased.
Direction "b"
Valve clearance is decreased.
a
d. Hold the adjusting screw to prevent it from
moving and tighten the locknut to the speci-
fied torque.
Locknut
14 Nm (1.4 m·kg, 10 ft·lb)
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.
8. Install:
• Timing mark accessing screw
• Crankshaft end accessing screw
9. Install:
• Spark plug
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
10.Connect:
• Spark plug cap
11.Install:
• Camshaft sprocket cover
Camshaft sprocket cover bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
• O-rings "1"
New
3-4
ENGINE
b