Yamaha Sirius T110LSE, Service Manual

Page: 60 / 308

a
b
4. Measure:
9
valve clearance
Out of specification
→
Adjust.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the crankshaft counterclockwise.
b. When the piston is at TDC on the compres-
sion stroke, align the “I” mark
a
on the
camshaft sprocket with the stationary point-
er
b
on the cylinder head.
c. Align the TDC mark
c
on the generator
rotor with the stationary pointer
d
on the
crankcase cover.
d. Measure the valve clearance with a thick-
ness gauge
1
.
Out of specification
→
Adjust.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
CHK
ADJ
ADJUSTING THE VALVE CLEARANCE
3-7
5. Adjust:
9
valve clearance
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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
until the specified valve clearance is
obtained.
Valve clearance (cold)
Intake valve
0.05–0.09 mm (0.0020–0.0035 in)
Exhaust valve
0.08–0.12 mm (0.0032–0.0045 in)
Direction
a a
Valve clearance is
increased.
Direction
b b
Valve clearance is
decreased.
Tappet adjusting tool
4 4
90890-01311
3S3-F8197-E0_3 05.11.1 19:58 Page 7