4-25
ENG
VALVES AND VALVE SPRINGS
2. Replace:
9
valve guide
NOTE:
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100°C in an oven.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the valve guide with the valve
guide remover
1
.
b. Install the new valve guide with the valve
guide installer
2
and valve guide remover
1
.
c. After installing the valve guide, bore the
valve guide with the valve guide reamer
3
to obtain the proper valve-stem-to-valve-
guide clearance.
NOTE:
After replacing the valve guide, reface the valve
seat.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Eliminate:
9
carbon deposits
(from the valve face and valve seat)
4. Check:
9
valve face
Pitting/wear
→
Grind the valve face.
9
valve stem end
Mushroom shape or diameter larger than
the body of the valve stem
→
Replace the
valve.
5.Measure:
9
valve margin thickness
a
Out of specification
→
Replace the valve.
Valve margin thickness
Intake: 0.5 – 0.9 mm
(0.0197 – 0.0354 in)
Exhaust: 0.8 – 1.2 mm
(0.0315 – 0.0472 in)
Valve guide remover (4.5 mm)
90890-04116
Valve guide installer (4.5 mm)
90890-04117
Valve guide reamer (4.5 mm)
90890-04118
3S3-F8197-E0_4_1 05.11.18 13:15 Page 25
Summary of Contents for Sirius T110LSE
Page 1: ...T110LE T110LSE SERVICE MANUAL 3S3 F8197 E0 ...
Page 2: ......
Page 6: ......
Page 8: ......
Page 10: ......
Page 12: ...GEN INFO ...
Page 22: ...SPEC ...
Page 99: ...ENG ...
Page 179: ...ENG 4 80 ...
Page 181: ...CARB ...
Page 261: ...ELEC ...
Page 265: ...ELEC CHECKING SWITCH CONTINUITY 7 4 ...
Page 301: ...TRBL SHTG ...
Page 303: ...TRBL SHTG TROUBLESHOOTING 8 2 COMPRESSION SYSTEM ...
Page 305: ...TRBL SHTG ...
Page 306: ......
Page 307: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...